I knew before posting someone would argue this mundane point so I debated whether or not to post it or not since it's pointless. Why? Because scientifically there's no set definition in stone since animals need to reproduce sexually and fish, well... They don't. They are literally just fish (most cases) but that really depends on who you side with so I'm not saying you're wrong, we're just both right. But who cares right?
Point being, there's no animal costumes, like non-fish animal costumes. No fox, no bears, no tigers, no nothing. Shai is made to wear these things and she would absolutely be adorable in them. Who needs a retirement plan when you can just spend it all on shai animal costumes! lol
ok ok OP, I think a Tarantula or Gecko suit would be cute x)