Are shrimp insects?

Lobsters and crabs are crustaceans (along with shrimp, rolypolys, barnacles, etc.). Crustaceans are not insects, but they are closely related to them. Traditionally, insects and crustaceans have been classified as two of the main groups within the phylum Arthropoda – so-called “sister groups”. read more

Shrimp are decapod crustaceans in the infraorder Caridea classification. They are not insects, even though shrimp has been referred to as the 'cockroaches of the ocean'. read more

Crustaceans (including crabs, shrimp, and lobsters) are pretty closely related to land insects. Lots (most) of them just crawl around the bottom eating whatever dead stuff they find, kind of like bugs on land. But in slang, only lobsters are called bugs. read more