A transparent goldfish that reveals its inner organs has been developed by a joint research team of Mie University and Nagoya University in Japan.

The aim of the project was to create a transparent fish that makes it possible for researchers to study blood constituents and organ behaviour without having to dissect the animal. Unlike ordinary goldfish variants, this type has therefore been made really big and can weigh up to 1 kg. Up until now, the transparent fish of choice for researchers have been the see-through zebrafish, but this tiny fish only weigh abut 3 grams and is therefore much more difficult to study than the 1 kg goldfish.

The translucent goldfish was developed in just three years by repeatedly letting selected pale goldfish specimens mate with each other.

“Pale-colored goldfish have little commercial value, but their negative value has turned into a positive,” said Mie University Associate Professor Yutaka Tamaru.

The creation of a transparent goldfish was announced Wednesday last week at the annual meeting of the Molecular Biology Society of Japan.

A bill introduced by Maui County Council Member Mike Molina may tighten up the rules for how aquarium fish is treated after being caught in Maui waters. Existing animal welfare laws only stipulate that ornamental fish collectors must maintain facilities that can keep the fish alive and “in reasonable health”.

“The reality is that the inhumane treatment is inherent in the trade,” said environmentalist and dive operator Renee Umberger. “They don’t consider them to really be animals. That’s why it’s important to change the (legal) definition of what the state considers pets.”

The new bill would piggyback on superseding state laws and is intended to make sure that ornamental fish is treated well. Molina also hopes that the bill will raise awareness about overfishing and the fragility of Hawaii’s reefs. Over the past two decades, Hawaii’s aquarium reef fish population has declined by nearly 60 percent.

According to statistics from the state Department of Land and Natural Resources, Maui fishermen caught aquarium fish valued at $32,478 last year. In the entire state, the value of all caught aquarium fish was roughly $2 million in the same period.

Robert Wintner, owner of Snorkel Bob’s, now questions why Hawaii is endangering its reef fish population for a mere $2 million a year when hundreds of local jobs in the multimillion scuba and tour sector depends on the wellbeing of the reefs.

Examples of what the Molina bill is suggesting

• Prohibition of several industry practises, such deflating the swim bladder, exposing the fish to air, and temperature changes of more than 2 degrees.
• Mortality rates and dead fish disposal methods must be documented.
• Causing the death of an ornamental fish will be considered an inhumane treatment of aquatic life.
• Violation of the law would be a misdemeanour. The fine would range between $500 and $2,000 and up to a year in jail.

Before the bill goes before the full County Council, it needs to be assigned to a committee for further discussion.

Taiwan plans to set up an aquarium fish R&D and export centre in 2011 in an effort of becoming Asia’s main aquarium fish exporter, a Council of Agriculture (COA) official said Wednesday.

Construction is scheduled to commence next year in the Pingtung Agricultural Biotechnology Park (PABP).

Right now, the yearly Taiwanese export of aquarium fish is no larger than 3 million USD, while Singapore has an annual export valued well above 60 million USD.

Chen Chien-pin, head of the preparatory office of the PABP, predicts that the value of the Taiwanese aquarium fish export will exceed that of Singapore when the centre as been in operation for five years.

The estimated price tag for the new facility is 1.19 billion New Taiwan Dollars, which is roughly equivalent of 37 million USD.

Eight School shark pups have been born at the Kelly Tarlton’s Underwater World, after their mother was wounded by a Broadnose Sevengill shark.

Animal keepers at the public aquarium didn’t even know the female School shark was pregnant, and was amazed to see four tiny sharks swim out of the gouge. When the female was treated for her injury, four more shark pups were found inside her.

Despite being born prematurely, all eight shark pups are healthy. They have been transferred to a predator free area and will be raised by Kelly Tarlton’s curator team until they are strong enough to be released into the wild, something which will probably happen within 6-8 weeks. The pups are currently being fattened up on a diet of herring and mullet.

Interestingly enough, the aggressive Broadnose Sevengill shark may actually have saved the lives of the School shark pups by attacking their mother and forcing them to enter the world prematurely.

“Ironically the fight their mother got into probably saved these pups’ lives! Sharks don’t have maternal instincts and just birth or ‘drop’ their babies and swim off – leaving them incredibly vulnerable. Because we didn’t know she was pregnant, and she would be most likely to give birth at night, we probably wouldn’t have gotten to the pups in time to move them to a safe, predator free area,” said Marine Biologist Andrew Christie, curator at the aquarium.

An aquarium fish has survived seven months in a fish tank without being fed or cared for, since its owner is in police custody after being accused of killing two Chilean students and wounding three others.

When employees from Contractor’s Choice and members of the Summer Lake Homeowners Association walked into the vacant town house at Miramar Beach, Florida, they discovered what appears to be a plecostomus.

The fish was apparently overlooked when lawmen removed the other pets – fish and birds – from the home after the arrest of the pet owner Dannie Baker. The fish went unnoticed for so long because Baker’s home was closed to the homeowners association after the arrest.

“I was very upset because I thought the police had taken everything after Dannie’s arrest,” said Dianne Richmond, vice president of the homeowners association. “This poor fish has been in that boiling house with no air conditioning and nothing to eat for about seven months.”

The pleco was discovered by the fiancée of Contractor’s Choice owner, who noticed something moving in the tank and sprinkled some fish food in the water. This caused the pleco to swim out into the open to feed.

When the pleco was discovered, much of the water in its tank had evaporated and the remaining water had turned dark.

Josh Olis, an account manager at Contractor’s Choice, said he didn’t believe it when his boss told him a fish was still alive in the tank. After seeing it for himself, he and the owner refilled the tank with about 50 gallons of water. He said he will make sure the fish is fed for as long as the company is working in the home. The contractors have even given the fish a name – Theo.

“I think we’re going to accept him into the cleaning family for now,” Olis said. “He’s been living in that tank for so long, surviving off algae. I have so much respect for him, I had to name him.”

The employees at Contractor’s Choice are now looking for a permanent home for Theo.

“This poor fish has really worked for a new home,” Richmond said. “It’s a wonder he’s survived this.”

AC Comment

Although I certainly don’t recommend neglecting your plecos for seven months, I’m not very surprised that Theo was alive and kicking when they found him. Many of the catfish species commonly referred to as plecos are algae-eaters (especially when young), so if there was any light coming into the room, Theo probably had some food to eat since nobody was there scrubbing away the algae. It all comes down to how large the tank is; a big tank may generate enough algae to keep a pleco alive (albeit hungry and malnourished) for several months.

Also, the natural habitat of plecos is Central and South America, so living without air conditioning in Florida is probably not something that bothered Theo much, especially if the aquarium was placed in a location where it was sheltered from sunlight during the harshest hours of the day.

Evaporation on the other hand, that is a real threat. The build up of waste in the water was probably tolerated by Theo since the progress was slow and gradual, but eventually ending up with hardly any water due to evaporation would naturally have killed him.

Last but not least, a word of caution. Although the employees of Contractor’s Choice acted admirably and should be applauded for taking such an interested in an abandoned fish, giving Theo 50 gallons of new water was actually quite risky since such a rapid change of water quality (and probably also temperature) can be lethal to fish – especially if the tap water is also heavily chlorinated. (But this is naturally impossible to know unless you’re an aquarist so I don’t mean to sound condescending here.) If you find a neglected fish, the safest method is to gradually change water quality and temperature until conditions are ideal for that particular species.

In most species, a male specimen will usually don’t invest a lot of time or energy in caring for young when there is a good chance that he is not their father. There are how ever exceptions to this rule, such as the Ocellated wrasse.

Yale University researchers studying the breeding behaviour of this Mediterranean fish have found that a male Ocellated wrasse is more likely to care for the offspring when there is grave doubt about who actually fathered them.

The study also showed that female Ocellated wrasse will deposit more eggs in a nest where the nesting male is surrounded by non-nesting “sneaker males”; males who are keen to fertilize the eggs but have no plans ever caring for the offspring. Females will also deposit more eggs in nests where there are already large numbers of offspring.

“Parental male oscellated wrasse are more likely to care for offspring in this sperm-filled  environment than in nests in which there is less sexual competition”, said Suzanne H. Alonzo, assistant professor of ecology and evolutionary biology and co-author of the study.

Even though the caring male has a greater chance of ending up taking care of someone else’s offspring if he allow other males to hang around, he still benefits from having a lot of “sneaker males” near his nest since it will make the females deposit more eggs.

“While our simpler theories have trouble explaining the diversity of what we observe in nature, these patterns do have explanations,” Alonzo said. “The paper suggests we may have oversimplified the evolutionary dynamics of how these things work.”

The paper has been published in the edition of the journal Proceedings of the Royal Society of London. The study was carried out by Suzanne H. Alonzo, assistant professor of ecology and evolutionary biology and Kellie L. Heckman, a postdoctoral fellow in the department.

According to Thaphol Somsakul, a civilian dive instructor with the Navy, rare marine species like Giant stingray and Ronin are becoming harder to find in their regular Thai habitats as they are sold to aquariums by fishermen.

Thaphol said he became suspicious after noticing rare species with distinctive marks at various trawler piers, and then seeing them later in aquariums.

“The decrease in number of these species coincides with the increase in the number of new aquariums opening, as well as in the number of rare species on display,” he said, citing his own experience and reports from fellow divers. “I interviewed fishermen who all said those rare species were trapped in their nets by chance.”

Unlike protected or endangered species, rare species are not protected by Thai law. A one year joint project by the Navy, PTTEP, and the NaturalResources and Environment Ministry is however scheduled to inspect 20 sites in the Gulf of Thailand and the Andaman Sea to locate coral reef sites and gather information that will be used in a coming reef conservation project.

Larry, a 3-foot-long Tawny nurse shark (Nebrius ferrugineus) has been moved from his cramped dwellings in a Burbank pet store to the Birch Aquarium, a public aquarium and museum capable of offering him much more spacious accommodations. The Birch Aquarium is a part of the Scripps Institution of Oceanography in La Jolla, which in turn is part of the University of California in San Diego.

Larry’s move to a new home is the result of Burbank resident Stephanie Field spotting Larry at the Scales ‘n’ Tails pet shop in Burbank.

“I swore to him I would get him out of there”, Field said.

After discussing the situation with PETA and an animal shelter, Field went back to the store to talk to the owner Vahe Issaian. She had decided to purchase Larry and set him free in the ocean off the coast of California, but Issaian explained to her that doing so would only serve to kill the shark.

“That’s when I found out Vahe is a really good guy,” Field said.

As it turned out, Issaian had been trying to find a new home for Larry for quite some time but without any success. Issaian had first brought him to his pet store in 2001 when Larry’s owner left for military service and could care for his big fish any longer. In 2002, Larry was purchased by a couple from Valencia with whom he stayed until 2008.

“They had it for five years, and I picked it up in mid-2008 because they were remodelling their home and didn’t have an eight-foot wall for the aquarium,” Issaian said.

Since then, Larry had been living at Issaian’s other Burbank store, Millenium Pets. Trying to find a new home for a shark that can reach a length of 10 feet (3 metre) is not the easiest thing in the world since few people have enough space to devote to such a gigantic pet.

Finally, it was Field’s mother who suggested calling the Australian Consulate and this set the wheels in motion. After talking to the consulate on Wednesday morning, Field received an e-mail that same day telling her that progress had been made and that she could stop making calls.

On Tuesday, assistant curator Fernando Nosratpour picked up Larry from the pet shop and moved him to his new home. Larry will now spend two weeks in quarantine before he’s introduced to the other sharks.

Always research pets before you buy them

Adult Tawny nurse sharks can reach a length of 10 feet (3 metres) and getting a nurse shark for your hobby aquarium is not a good idea unless you have a HUGE tank. Nosratpour says that the Birch Aquarium do receive offers now and then to take nurse sharks that people have bought without first researching how large they will become as adults.

“Most public aquariums can’t take them anymore,” he said. “Pet stores can’t take them, and you can’t ship them back to where they are from. But people still buy them, and that’s a problem.”

The Tawny nurse shark is found in the Indian and Pacific Oceans in a region stretching from the northern coast of Australia and almost all the way to the Red Sea. It is the only now living member of the genus Nebrius and can be distinguished form other nurse sharks by its angular fins. It is listed as “Vulnerable” on the IUCN Red List of Threatened Species.

The world’s first public aquarium specialising in clownfish has now opened its door for visitors. The aquarium, which is located in Taitung County in Taiwan, will eventually house 1500 clown fish from 18 different species.

The aim of the clownfish aquarium is to educate the public about clownfish life-cycles and captive breeding techniques, and specimens will be sent to the aquarium by breeders such as the Eastern Marine Biology Research Center in Taitung.

“By meeting market needs we are helping to ease the crisis of clownfish species being endangered”, says researcher and museum planner Ho Yuan-hsing. “Due to the increasing number of artificially-bred clown fish, the fishing of clownfish is no longer seen in Taiwan’s coastal areas because it is unnecessary.”

AC comment:

The movie “Finding Nemo” made a lot of people interested in getting their own “Nemo”, but few were willing to learn how to properly maintain a saltwater aquarium. Before you decide to get a clownfish, please keep in mind that these are marine fishes. Simply adding some salt to your freshwater aquarium will not make is a suitable home for marine fish; not even for the sturdy clownfish. Even though the worst Nemo-craze seems to have cooled off now, a lot of “Nemos” still face an early death in the hands of uninformed fish keepers; deaths that could have been easily prevented.

Up to 50 lungfish, some of them up to on metre long, was killed when tonnes of water was released from an Australian dam this week.

The water was released from the North Pine Dam in southeast Queensland between Monday morning and Tuesday night as heavy rains were threatening to overfill the dam.

According to SEQWater, who manages the North Pine Dam, up to 100 native fish went with the release, including roughly a dozen lungfish. SEQWater spokesman Mike Foster said staff were on the scene at every dam release to check for “fish kills” and that they had rescued a handful of lungfish from pools. He also stated that staff would return on Thursday [today] to see if more could be done.

In May, when the North Pine Dam opened its gates for the first time in many years, up to 150 lungfish were rescued.

Roger Currie, spokesman for the Wide Bay Burnett Conservation Council, said conservationists on the scene during the most recent water release had found up to 50 lungfish that had been killed or mutilated as a result of the release.

“Some were found caught in trees yesterday and last night,” Currie said. “They’ve just been pummelled by the sheer force of it.”

The Wide Bay Burnett Conservation Council is pushing for a study to find out how large the North Pine Dam lungfish population is, and the council is also calling for measures to protect fish during water releases.

Lungfish of the species Neoceratodus forsteri.
Copyright www.jjphoto.dk

What’s so special about the Australian lungfish?
The Queensland lungfish, Neoceratodus forsteri, is the only now living member of the family Ceratodontidae and order Ceratodontiformes. Also known as Australian lungfish or Barramunda, Neoceratodus forsteri is native only to the Mary and Burnett river systems in south-eastern Queensland. It has however been introduced to several other Australian rivers south of this area during the past century.

Fossil records of the lungfish group date back 380 million years to a period when the higher vertebrate classes were at the starting point of their development. Prehistoric fossils unearthed in New South Wales are almost identical to the now living Qeensland lungfish, indicating that this species hardly has evolved at all during the last 100 million years. Lungfishes flourished during the Devonian period (c. 413-365 million years ago) but only six species of freshwater lungfish remain today; one in Australia, one in South America, and four in Africa.

The Queensland lungfish can survive for several days out of water, but only if kept moist. It can breathe oxygen directly from the air using its lung-like swim bladder. This species is remarkably long-lived compared to most other fish species and will usually attain an age of at least 20-25 years if it manages to survive into adulthood. Granddad, a Queensland lungfish living at the Shedd Aquarium in Chicago, is at least 80 years old. He has been housed at the aquarium since 1933 and seen many generations of zoo keepers come and go. The largest