Seems like that could make for a ripe Tier 1 or at least Tier 2 water form.

Giant Blowfish (or other species-related name)

Inflate: Expand your size, position your poison barbs to defend against enemies while sacrificing regular attacks

- Could offer the waterform a porcupine-like affect where most attacks receive damage back to the attacker that do great damage and have a chance to poison.

- Depending on the forms natural defenses, say it has superior dodge/evasion while not inflated, while inflated, it switches to some dam redux but gains buoyancy so any major attacks have a chance to shoot the form out of the room.

Crunch: using their natural ability for crushing crustaceans and mollusks, can inflict boneshatter maladictions

Never the less... missed opportunity or no?