1. Light squid (also known as rocket squid) belongs to deep-sea squid, living at an altitude of 500- 1000 meters, and is one of the deepest carnivores in the world. They have a luminous organ at the top, which can emit strong blue light to attract prey and avoid natural enemies. Light squid has a wide head, thick tentacles and a thick body, and its color is mostly taupe.
2. The common squid is a mollusk belonging to Cephalopoda. They are widely distributed and mainly live in shallow coastal waters, including the Atlantic Ocean, Indian Ocean and Pacific Ocean. The body of a common squid is cylindrical, consisting of a head, a trunk and eight tentacles. There are many suckers on the tentacles, which can be used to grab prey or climb rocks or other objects.