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