anthias - basses, black
- anthias
- anthias, common
- antimora, blue
- antimoras
- aphyosemion, Cameroon round-tailed
- aphyosemion, Meinken’s
- aphyosemion, Peters’
- aphyosemion, plumed
- aphyosemion, Roloffs
- aphyosemion, steelblue
- aplochitonids
- arapaima
- arapaimas
- arawana
- arawanas
- archerfish
- archerfish, primitive
- archerfishes
- archerfishes, primitive
- argentina
- argentine
- argentine, Atlantic
- argentine, blue-throated
- argentine, forgotten
- argentine, Greenland
- argentine, half-banded
- argentine, Japanese
- argentine, Mediterranean large-eyed
- argentine, Pacific
- argentine, slender
- argentine, small-mouthed
- argentine, small-toothed
- argentine, striated
- argentines
- argentines, large-eyed
- argus-fish
- ariomma, Indian
- ariommas
- ariommids
- armourhead, Cape
