This page follows the typical taxonomy for species in This will mainly list characters from the games, IDW comics, Sonic Boom, and major ones of the Archie comics. Anyone is free to edit this page and add on to it.
Jawless fishes (Agnatha)
Cartilaginous fishes (Chondrichthyes)
Bony fishes (Osteichthyes)
- Mimic (mimic octopus, T. T. mimicus)
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