Interesting facts about squids

Posted on May 1, 2021      112

There are many squids in all the oceans of the world. Some of them are well known and widely consumed by humans, while others are not studied at all. There are deep-sea species of these mollusks that live where there is no sunlight, and very little reliable information is still known about them.

Facts about squids

  • Some of them have different sized right and left eyes. This is not a coincidence - fresh eyes detect light of different intensity, helping the squid navigate in space.
  • They have three hearts. Two of them have an auxiliary function, and they pump blood to the main heart, and it sends it on to other organs.
  • Squids Octopoteuthis deletron, which live at depths of up to 800 meters, have a brief period of sexual maturity. Therefore, males have developed a breeding strategy in which they do not distinguish whether it is a female or another male in front of them. Meeting a squid of their species of any sex in the dark, they attack it and smear it with spermatophores, i.e. sperm capsules.

  • Squid blood is blue, not red. Our blood is colored red by iron, but in theirs, instead of iron, oxygen is carried by copper.
  • There are so-called flying squids in the Pacific Ocean. Speeding up underwater and jumping to the surface, they fly 20-30 meters.
  • All species of these creatures have 10 tentacles. Eight of them are used for a variety of tasks, and two, the strongest and longest, catch prey.
  • In near-surface waters there are many small species of squid. The deeper under the water, the larger they are.
  • Squids that live in cold circumpolar waters have translucent bodies, as do some fish that live in similar conditions.
  • Scientists know about three hundred species of squid. But they believe there are almost twice as many, just not all have been studied yet. Some, apparently, have not even been discovered yet.
  • They are the least studied of all the inhabitants of the sea depths.
  • Squids are not found in fresh water. They can live only in salt water.
  • The largest of them is the giant squid, reaching 13-14 meters. It is found only in the Southern Ocean.
  • The second largest and the first by weight are the Architeuthis squids. They grow up to 8-10 meters and weigh up to 500 kg.
  • Some species of these marine life spend their entire lives in complete darkness, at a depth of thousands of meters. And sunlight penetrates the water to just 100-200 meters, no more.
  • For the first time it was possible to capture a living giant squid on video only in 2006.

  • All squids - predators, but they themselves are often someone’s prey. As zoologists have calculated, about 1% of the diet of all sea creatures on average are squids, mostly the smaller species.
  • Their brains are small, but the squid’s level of intelligence is quite high, and they really know how to think. The brain hides in the hardest part of their body, in the cartilaginous part of the head.
  • Many of them are badass cannibals. They are always ready to eat, even members of their own species.
  • The largest squid suckers can have a diameter of about five centimeters. And some of their species also have claws on the ends of the tentacles!
  • Giant squids differ in a neutral buoyancy, and therefore in the water they feel very confident. But their smaller congeners mostly “sink”, so they have to constantly move in order not to go deep.