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View Full Version : ID confirmation. But where did they come from?



dynara
07-26-2010, 01:32 AM
My mum's pond is stocked with white cloud mountain minnows and rosy barbs. But we've been noticing some fish that don't really look like either of these species. They're definitely not the barbs as the barbs weren't added until after we started seeing these other fish, but they didn't look like the minnows either - they were larger, didn't have the red on their fins and seemed to occupy a different level of the water column (lower down). So after trying off and on for several weeks I finally managed to catch one of these guys. They look like rainbowfish to me, possibly M. doublayi which are native to my area. But how on earth did they get here? The only thing I can think of is that they went in the bag with the minnows by accident. Can anyone confirm they are M. doublayi? And does anyone have any info on these guys, I can't seem to find much on the net.

Sorry for the poor quality of the photos, my camera batteries are about to die so I could only get off a few quick shots. The fish in the pics is about an inch long and is about half the size of some of the others in the pond.

http://i795.photobucket.com/albums/yy233/dynara/Aquarium/057.jpg

http://i795.photobucket.com/albums/yy233/dynara/Aquarium/059.jpg

jackson17
07-26-2010, 01:38 AM
Looks like a type of tetra

Brhino
07-26-2010, 01:41 AM
if you say they're native to your area, there's a number of ways they could have gotten into your pond. I believe one of the most common ways is that fish eggs will sometimes stick to the legs on an aquatic bird, which will then transport them from one body of water to the other as it travels.

dynara
07-26-2010, 02:10 AM
Oops, that's actually spelled M. duboulayi. Also known as the crimson spot rainbowfish. There seem to be quite a few colour morphs but at least some of the pics I can find on the net are a dead ringer for this guy.

That's really interesting Bhrino. There is a stork that visits our yard from time to time. I've never seen him in the pond but you never know...

Edit: found this pic on the Australian Museum website, I think we have a winner.

http://australianmuseum.net.au/Crimsonspotted-Rainbowfish-Melanotaenia-duboulayi-Castelnau-1878