Definition: Sturnidoecus is a species of fish in the family Sturnidae, which belong to the order Spongiiformes and are commonly known as sponges or whelks. This group of marine animals is characterized by their large, flattened body shape and long, slender tentacles that extend from the back. They primarily inhabit the tropical and subtropical oceans, where they can be found in areas like coral reefs, seagrass beds, and mangrove swamps.