Jan 23, 2026 · A squid is any of more than 300 species of 10-armed mollusks constituting the cephalopod order Teuthoidea (or Teuthida). They are found in coastal and as well as oceanic waters.

Squid, like cuttlefish, have eight arms arranged in pairs, and two longer tentacles with suckers. All squid have a mouth with a radula, and jet propulsion with the siphon from the mantle.

Nov 28, 2025 · Learn about squid species, physiology, diet, and evolution, including their bioluminescence, jet propulsion, and role in ocean ecosystems.

The predators differ from one squid species to the other, but penguins, seals, and sharks are common for most of them. The giant squid is a staple part of the sperm whale ’s diet.

What are squid? Squid have been around for millions of years, and inspired legends of terrifying ship-devouring sea monsters.

Squid are as different from humans as it gets, living, as they do, in habitats inhospitable to our species, using bodies with no bones, and lights instead of sounds to talk to one another.

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With their sleek bodies, agility, and unique characteristics, they continue to intrigue scientists and enthusiasts alike. The various species of squids, such as the Giant Squid, European Squid, and …

Among these, the squid stands out in its unique grace and diversity, with over 300 species of squid classified under the family Cephalopoda. Squids belong to the order Teuthida, a group distinguished …