What is the easiest way to tell the difference between an insect and a crustacean?

Answer 1

The easiest way to differentiate between an insect and a crustacean is to examine their body structure and habitat. Insects typically have three main body segments (head, thorax, abdomen), six legs, and usually possess wings at some stage of their life cycle. Crustaceans, on the other hand, often have a more segmented body with a cephalothorax and abdomen, typically ten limbs (such as claws and legs), and are primarily aquatic. Additionally, insects breathe air through spiracles, while crustaceans usually have gills for underwater respiration.