To split into branches or constituent parts; to send forth branches or extensions.

Accessory or spurious gill, often located on the inner surface of the operculum in various fishes, that is usually small and sometimes completely obscured beneath the epithelium. Also referred to as pseudobranchia.

Located behind the eye.

In front of the caudal fin or posterior end of the body.

Departing from an accepted standard.

A muscle whose contraction moves a limb or other part of the body towards the midline of the body or other part.

Transparent eyelid present in some fishes, that covers some or all of the eye.

© FAO

The growth of body parts at different rates, resulting in a change of body proportions; the study of this phenomenon.

The hard upper shell of a tortoise, crustacean, or arachnid.

A v-shaped line or stripe.