Those things are Humbolt Squid.
"Jumbo squid can reach up to six feet and weigh as much as 100 pounds. Their skin varies from deep purplish-red to white. Like other cephalopods, muscle-bound chromatophores on their skin enable them to flash a range of colors. They have two diamond-shaped fins which they use to swim and glide."
"Jumbo squid are notoriously aggressive and have earned the nickname diablos rojos, or “red devils� from Mexican shrimpers, who fish them in the off-season. Fishermen exploit the Humboldts' affinity for lanternfish by using lights as fishing lures. The squid may attack divers when threatened and will continue to put up a fight even after they've been caught, blasting their captors with water and ink."
“The Humboldt squid is a voracious predator that will eat anything it can get its tentacles on,” Benoit-Bird says. “We put a pair of 10-pound squid into a tank and one immediately beheaded the other. These are fierce little beasts.”
"They have a large, tough, thick-walled mantle and long arms with 100-200 powerful hooked suckers on each and lightning-fast tentacles."
"The sharp beak of the Humboldt squid is one of the hardest and stiffest organic materials known. Engineers, biologists, and marine scientists at the University of California, Santa Barbara, have joined forces to discover how the soft, gelatinous squid can operate its knife-like beak without tearing itself to pieces."
The Mexican fishermen who make their living capturing these animals are very respectful of the squid's potential danger. They certainly don't want to fall in the water into a school of them.
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2001 Cobalt 206, 280hp V/P DP
2003 Toyota 4-Runner Ltd