Ampithoidae is a family of amphipod crustaceans.

The family has a worldwide distribution as algal dwellers.

They commonly create tube-shaped nests on their host plants or algae which serve as both shelter and food.

Young ampithoids develop from eggs to a larval stage within their mother's brood-pouch, formed by the appendages of her abdomen.

The World Register of Marine Species includes the following genera in this family:-