Magnapinna lives 3 miles below sea level. Their arms can be 8 meters long.

Grimalditeuthis use the ends of their tentacles as "puppets" to attract food

Cockeyed squid (also called strawberry squid) have one small eye for seeing close-by bioluminescence and one huge eye for seeing faint silhouettes of animals swimming above

Firefly squid are covered in light-producing structures called photophores