How many tentacles squid

All squid have suckers and their number, type, and arrangement is unique for each species. Squid suckers have a calcareous inner structure.

In colossal squid these are sharply serrated and probably lethal to prey. Toothfish caught on longlines sometimes have circular marks where they have been damaged by colossal squid suckers. Tentacle club swivelling hook and arm sucker dissected out from the fleshy suckers, Te Papa.

Other squid families have hooks on the arms or tentacles, or both. The colossal squid is the only hooked squid in its family the Cranchiidae , which includes about 20 species. Like all squid and octopus, and their relatives, the colossal squid has a beak. This is essentially the mouth of the squid, and the first stage of the digestive system. How they look: Octopuses have a mantle, rounded head, rectangular pupils on their two eyes, eight arms, and come in a wide variety of colors while squids have two fins at the top of their mantle, a triangular head, circular pupils on their eyes, a rigid backbone-like structure called a pen, and a combination of arms and tentacles, which have hooks and suckers.

Their appendages: Octopuses have eight arms covered in suckers while squids have eight arms and two longer tentacles used to catch fish and shrimp in open-ocean waters. Octopus arms are more flexible than those of a squid, allowing them to walk, handle objects, and manipulate their environment.

Defenses: Some species of squids can expel clouds of ink into the water for a quick escape when they feel threatened while an octopus can change colors to hide or squeeze their bodies into the tiniest of crevices or objects like shells. Reproduction: Male octopuses use a specialized arm the hectocotylus to transfer sperm to a female, who then lays groups of eggs in strings that might resemble decorative strings of holiday lights in her den.

Event the largest, the giant squid, grows to its gargantuan size in just a few years. The only exception is the nautilus which can live much longer. Octopus are the best known of the cephalopods with their charismatic personalities, intelligence, and diversity. There are about different types of octopus currently known, and new types are discovered by scientists relatively often, especially in the deep sea.

Octopus have eight arms with two rows of suction cups extending the full length of each arm. The arms come together at a centralized mouth with a hard parrot-like beak. Male and female octopus have the same number of arms, but males have one arm that is slightly different and is designed to hold and deposit sperm packets into the female octopus.

Octopus can be found from the deep sea to coastal tide pools, and from warm tropical seas to the frigid Arctic and Antarctic Oceans. They can be huge, like the the Giant Pacific Octopus of the cold waters of the North Pacific, whose average 50 pound weight and 15 foot arm span dwarfs most other octopus. The smallest, Octopus Wolfi, is barely 2. Octopus, in general, are masters of camouflage. They have the ability to change both the color and texture of their skin.

Specialized cells called chromatophores expand and contract exposing different pigments within the skin. This can help octopus, and other cephalopods, blend in with nearly any background and communicate their feelings to friend and foe. By contracting different muscles, octopus can also change the texture of their skin, hiding among rocks, boulders, seaweed, or corals with ease.

Octopus have 3 hearts and 9 brains! There is one central brain, and then each arm has a rudimentary brain. They have a shell inside their bodies called a pen. There are about species of squid.

Squid have 10 arms. Two of their arms are longer than the other eight and are called tentacles. Squid range in size from under an inch to more than 60 feet in length!

They have long, tubular bodies and little heads. Squid are very fast swimmers and use a kind of jet propulsion to move. Squid suck water into a long tube called a siphon and then push it back out.