How long do fish eggs take to hatch?

[doug z]

I don't suppose fish eggs look different from one another according to species?

Different gestation periods?

I noticed some fish eggs on the bottom of my 20g QT tank (yippeeeee!!), but I don't know wether it's from the cardinals that I had in there, or the hatchets..

What do I do now? How long till they hatch?

[Heliwyr]

Depends on the species. Rasbora eggs hatch in like a day. Gudgeon eggs hatch in 3-7 days.

I would think that fish that spawn on leaves and things and don't care for their eggs/fry would hatch faster than fish that do care for their eggs/fry.

[Algenco]

hopefully they're hatchets, light destroys Cardinal eggs

[doug z]

light destroys Cardinal eggs

Oh-oh....

Instantaneously?

Because all of the eggs were under a piece of driftwood that I removed to make catching the cardinals easier.. :((

[Algenco]

Cardinals have to kept in total darkness while spawning/ eggs hatching/ and for a week or two after becoming free swimming, then gradually weaned to light

[doug z]

Cardinals have to kept in total darkness while spawning

Hmmmmm..

How do you manage that??

[Algenco]

tough, pain in the butt,
paint the tank black and cover completely,

[doug z]

Dang..

Guess no cardinal fry for me.. :(