guppy
Ray
Silverfish is an insect but it ends with fish!
Herring Please see the related link below
its got a big pointy uppy thing
You should ask ‘what bird name starts and ends in a vowel?’
loads uppy downy over under and my faveret the raipathon
plaice
Pollack and haddock both end with the letter "k." Shark have gills, so they are fish too. There are probably many other fish too.
the saddle fish serpae fish shortnose fish shovelnose fish Siamese fish
A dace
Eel
tarpon