Whether it casts shadows.
Mesh resolution.
Starting species (an id in FISH_SPECIES).
Whether it receives shadows.
Seed for this fish's size and colour variation.
The species, resolved from preset plus your overrides.
Swimming speed in body lengths per second (drives the tail beat).
Material states.
−1 … 1: how hard it is turning (bends the body).
Every setting of a hero Fish.