The innermost layer, the gastrodermis also referred to as the gastrovascular cavity functions as the gut of the anemone.

The gut of the fish-eating anemone is divided into compartments by sheets of tissue called “septa”.

[2] Even though it can be found in intertidal zones as well it most commonly inhabits exposed, rocky Subtidal areas of outer coastlines.

The fish eating anemone on the other hand is dioecious, meaning that  it has distinct male and female individual organisms.

[5] However, Oxylebius pictus (the painted greenling) and Lebbeus grandimanus (candy stripe shrimp) have the ability to remain among the tentacles without being harmed.

Unlike other sea anemone which are mostly sessile, Urticina piscivora has the ability to detach quickly and reposition itself when it feels threatened by a predatory starfish.