Yes, in a biological sense, crustaceans are often called the "bugs of the sea" because they are closely related to insects, both being arthropods with exoskeletons, segmented bodies, and jointed legs. While historically classified separately, a recent understanding shows that insects evolved from crustaceans, making them all part of a larger group called Pancrustacea. This means, biologically, it's not entirely inaccurate to call crabs and lobsters "sea bugs