Giant Squid (Architeuthis dux)

Phylum Mollusca Class Cephalopoda Possibly 8 species feet in length Weigh lbs. Inhabit temperate waters to depths of feet ( m) Maintain neutral buoyancy in seawater through an ammonium chloride solution which flows throughout their body and is lighter than seawater

Worldwide giant squid distribution based on recovered specimens.

Arms and tentacles are lined with hundreds of sub-spherical suction cups ~2.0 in in diameter

Feed on deep-sea fish and other squid species Catch prey using the two tentacles, gripping it with serrated sucker rings on the ends Only known predators are sperm whales

Genus Sphyraena 27 known species Ray-finned fish Can weigh up to 100 lbs. Grow up to 6 ft. in length and 1 foot wide Inhabits tropical and subtropical waters of the Atlantic, Indian, and Pacific Oceans Primarily clear water around coral reefs

Collective name for a group of barracudas is a battery Feeds on shrimp and any number of other fish Primarily a feeder of reefs Sleek body Use speed to dart through schools of fish (up to 28 miles per hour) Injure fish with razor sharp teeth

Particularly prefer algae-eating fish Some of these have a build up of toxins Ciguatera poisoning in humans

Very aggressive However, rarely attack humans Attracted to shiny things If they do attack, usually one quick lunge Brutal, but not usually fatal