The flavor of crabs has made them a tasty catch in many countries.
Some species are on the verge of extinction, partly due to the destruction of coral reefs caused by global warming. Today we will tell you interesting facts about crabs.
Facts about crabs
- Crabs can grow to huge sizes – for example, the species of spider crabs, which live off the coast of Japan, with almost four meters of foot span can weigh up to 19 kg.
- The Earth is inhabited by more than 6780 species of crabs.
- The Kamchatka crab is actually not a crab, but a hermit crab that looks like a crab.
- Crabs account for more than 20% of the total number of marine crustaceans, which are caught, grown, and sold annually. This is about 1.5 million tons per year.
- They can easily get out of the bucket and run away on their own, but if there are more than one, the escape is doomed to failure – other crabs will grab a fellow crab who is close to freedom, and do everything possible to prevent him.
- The first time he saw a cancerous tumor, Hippocrates called it a “crab,” because its shape resembled a shellfish shell, and the veins that departed from it – his numerous legs. Then, the Roman doctors translated the Greek word “crab” into Latin and began to refer to the disease with the term “cancer”.
- The crab bodies are inhabited by the Sacculina parasite, which has almost no internal organs. It infiltrates the body of the crab carrier, uses its body to maintain its vital functions, and then lays eggs and places them in a bag under the crab’s belly. Female crabs carry them as their own, losing their ability to reproduce, and male crab parasites chemically castrate and they begin to behave like females.
- Self-protection crab boxers carry poisonous assets, which can be launched into the enemy if necessary.
- Yeti crabs, living a few thousand meters under the surface of the ocean, eat bacteria, which are cultivated on their own shell. They come up to the crevices from which the surface comes methane and sulfur compounds, as such places are saturated with bacteria. Crabs then help them to reproduce, putting the claws under the flow of water-saturated with chemicals – these actions are very similar to dance.
- Off the Japanese coast live crabs, on the shell of which there is a picture, very similar to the face of an angry samurai. Scientists believe that this species has grown thanks to the fishermen who let crabs with such shells back to the sea – ordinary people thought they were the souls of deceased warriors. Their fellow fishermen with ordinary shells were less lucky, so over time, a drawing on the back got all the representatives of the species.
- One claw of males tantalizing crabs much bigger than the other – it is this huge limb species owes its name, because crabs with its help lure the females. If a male loses a large claw in a fight with an opponent, he grows a new one in its place – weaker, but superior to the lost one.
- Crabs can stay on land for a long time, but they still breathe oxygen from the water accumulated in the gills.