Crustacean < UPDATED - 2027 >

: A hard, chitinous outer shell that provides protection and structural support. Many species further harden this shell through calcification .

: They are as ubiquitous in the ocean as insects are on land, filling roles as predators, scavengers, and vital food sources for larger animals. crustacean

are a vast and diverse group of invertebrate animals : A hard, chitinous outer shell that provides

: Their bodies are usually segmented, often featuring a cephalothorax (a fused head and trunk). Diverse Habitats and Ecological Roles are a vast and diverse group of invertebrate

: Tiny but essential links in the marine food web, supporting massive animals like whales.

: Sessile (fixed-in-place) sea creatures that attach to rocks, boats, or even whales . Scientific & Human Importance

: Because their shells are rigid, crustaceans must periodically shed and regrow them to accommodate growth.