- California slickhead
Alepocephalus tenebrosus
- Anadromous alewives
Alosa pseudoharengus
- American shad
Alosa sapidissima
- Broom-tail file
Aluterus scriptus
- Goggle eye
Ambloplites rupestris
- Croaking Spiny Catfish
Amblydoras hancockii
- Gorgeous goby
Amblyeleotris wheeleri
- Ozark Cavefish
Amblyopsis rosae
- Northern Cavefish
Amblyopsis spelaea
- Sand lance
Ammodytes americanus
- Clown anemonefish
Amphiprion ocellaris
- Four-eyes
Anableps anableps