Cosmic Fish would preferably be an animated movie tbh, so I'd go with Voice Actors.
Schnell is Stamper.
That is all.
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Actually no, ok. (Needed help with friends for this shouldn't take long.)
-2 hours later-
Krazzle would be voiced by Keith David. (Except this one, this has been law since 2011)
Acantha was recommended to be AJ Michalka aaaaand I can hear it, but I wouldn't say final. (Stevonnie in SU)
Gallo would be voiced by Ramón Rodriguez
Barbara Goodson for Ramus
Rosario Dawson for Hessa (still on the fence too but in this VA fantasy, I get to meet Rosario Dawson so...win-win)
Schnell is still Stamper
I would've liked for Acantha's VA to also be Puerto Rican but I couldn't think of any that fit u-u