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Description
I have since updated the snish's anatomy. Instead of using the snish's gill chamber as a swim bladder (which doesn't make sense) The swim bladder has evolved from the digestive system, being fully of methane gas.

CONTEXT:

Snish come from a fictional scenario, in which creatures and plants, common in aquatic jar ecosystems (such as bladder snails, copepods, hydroids, aquatic isopods and so on) are placed in an ocean-sized jar environment, several kilometers long. No fish exist in this scenario allowing snails to evolve as an analog.

Snish are a very large group of animals evolved from a snail ancestor. All Snish have two eyes, four tentacles, a mantle cavity that leads to their gills/lungs and anus, and an internal shell that resembles a vertebrate skeleton. Most are pelagic nekton in their adult forms, inhabiting almost every aquatic environment in the jar. Niches and diets vary wildly among Snish species.

Here is the original Reddit post: www.reddit.com/r/SpeculativeEv…

Description
I have since updated the snish's anatomy. Instead of using the snish's gill chamber as a swim bladder (which doesn't make sense) The swim bladder has evolved from the digestive system, being fully of methane gas.

CONTEXT:

Snish come from a fictional scenario, in which creatures and plants, common in aquatic jar ecosystems (such as bladder snails, copepods, hydroids, aquatic isopods and so on) are placed in an ocean-sized jar environment, several kilometers long. No fish exist in this scenario allowing snails to evolve as an analog.

Snish are a very large group of animals evolved from a snail ancestor. All Snish have two eyes, four tentacles, a mantle cavity that leads to their gills/lungs and anus, and an internal shell that resembles a vertebrate skeleton. Most are pelagic nekton in their adult forms, inhabiting almost every aquatic environment in the jar. Niches and diets vary wildly among Snish species.

Here is the original Reddit post: www.reddit.com/r/SpeculativeEv…