Review of the best according to the editors. About the selection criteria. The the material is subjective, is not advertising and is not serves as a guide to the purchase. Before purchase is needed consultation with a specialist.
Crustaceans – marine animals of the genus arthropods. They live in sea and fresh waters, as well as drier.
This group of arthropods includes crabs, crayfish, lobsters, shrimp etc. Their body usually consists of three secreted parts: head, chest and abdomen. Covered with a solid outer skeleton, or the so-called carapace. Periodically crustaceans him dumped so as not to interfere with growth. On the chest and abdomen are located paired limbs with which you can move around and to eat.
Some of the crustaceans are considered a delicacy and relate to endangered species due to intensive capture.
Today we will talk about the biggest representatives of this kind of.
- Rating of the largest crustaceans
- 8th place: Bokoplav – 34 cm
- 7th place: Tasmanian giant crab – 46 cm
- 6th place: Giant isopod – 70 cm
- 5th place: Tasmanian giant freshwater cancer – 80 cm
- 4th place: Coconut crab – 100 cm
- 3rd place: American lobster – 107 cm
- 2nd place: Alaskan Kamchatka crab – 180 cm
- 1st place: Japanese spider crab – 600 cm
Rating of the largest crustaceans
|Nomination||a place||Name of product||price|
|The largest crustaceans||1||Amphipod||34 cm.|
|2||Tasmanian Giant Crab||46 cm.|
|3||Giant isopod||70 cm|
|4||Tasmanian Giant Freshwater Cancer||80 cm|
|5||Coconut crab||100 cm.|
|6||American lobster||107 cm.|
|7||Alaskan king crab||180 cm.|
|8||Japanese spider crab||600 cm|
8th place: Bokoplav – 34 cm
The amphipod (mixed leg cancer or amphipod) refers to crustaceans to squad of higher crayfish.
The habitat can be different: from freshwater rivers to ocean depths.
Outwardly, the amphipod has a shape similar to shrimp. Body flattened with two sides, legs differ in structure. The first two pairs are equipped ticks to take food. The ends of the second pair of legs end claws turned back. On the three remaining claw pairs, on the contrary, turned forward. Using these limbs amphibian moves on the surface of the nutrient medium.
Usually, amphipods are no more than 10 mm in size, but there are specimens, reaching 28 cm. In the depression Kermadek – the western part of the Pacific ocean, a giant specimen was discovered – 34 cm. Such sizes are caused by deep-sea gigantism. More depth and higher atmospheric pressure, the larger the amphipods.
7th place: Tasmanian giant crab – 46 cm
Tasmanian crab – one of the largest representatives of the family crabs (squad “decapod crustaceans). It lives, as is clear from the name, in the waters of South Australia and the island of Tasmania, and is capable of grow to 46 centimeters in length.
Tasmanian giant crab can be found at a depth of 20-820 m. These crustaceans prefer soil from silt and rocks. Are fed carrion and small marine organisms. Sometimes relatives become food.
Tasmanian crab – one of the most long-lived representatives detachment. His age can reach 20 years. Moreover, the older crab – the less often it molts. Adult animals are changing the shell is about once every 10 years.
The Tasmanian “giant”, like the rest of the crabs, has 10 pairs of limbs: thoracic and abdominal. A pair of the largest are claws. They serve for food extraction, protection, participation in the battle for the female. The remaining limbs are used to move and shift food to mouth.
Animals differ from crayfish by a small abdomen, bent under chest that does not prevent them from moving. Skin replaces them chitinous shell protecting from enemies. Because of him animals it’s difficult to grow, so they solve this problem by changing it. Crab without the shell becomes soft and defenseless, therefore during the formation of a new “suit”, he hides in a secluded place and is growing.
6th place: Giant isopod – 70 cm
Giant isopods (or Isopods) are relatives of woodlice, differing from the latter in large sizes. They can grow up to 70 cm.
For the first time, a French zoologist wrote about these cancers in 1879. Alphonse Milne-Edwards. He watched a giant isopod. Her caught from the bottom of the Gulf of Mexico in the Atlantic Ocean. The isopod cancer was a great discovery for the world of scientists. While many believed that life was absent in the depths.
Isopods look like wood lice. Their bodies cover hard plates for protection during danger. Isopods fold when predators appear that cannot penetrate the carapace.
These marine animals are carnivorous. Their food is usually water organisms and slow moving fish. Giant at the same time isotopes are often called ocean cleaners, as they corpses of sharks, whales, and other inhabitants of the depths eat. However, if food is scarce, these giants may not eat at all for a long time. Their hunger strike may drag on to five years old.
Isopods crayfish live mainly on a fairly large deeper, preferring loneliness.
5th place: Tasmanian giant freshwater cancer – 80 cm
Tasmanian giant freshwater cancer today is the largest freshwater invertebrate order crustaceans. He lives exclusively in rivers below 400 meters above sea level in northern Tasmania. It is entered in the Red Book as endangered species.
This cancer is very whimsical to its home. He likes to settle in the shade. quiet rivers and streams with clean, fresh and cool water.
It can be of different colors – it depends on the habitat: from green-blue to brown. Sometimes blue crayfish come across.
Everything that is in a reservoir serves as food. Old leaves, wood, fish, invertebrates – what the largest freshwater loves cancer.
Crayfish try to stay away from large animals and fish, so what a delicacy is for them.
Once Tasmanian giant freshwater crayfish to the fullest rightly considered giants. 80 cm in length – the true size of these giants. Weight ranged from 5 kg. Now this kind of crayfish dying out. They reach a maximum size of 40-60 cm.
The reproductive process in this species of crustaceans is quite long lasting. In males, the reproductive season begins at 9 years, for women – at 14 years. Also, “men” have a real harem of several females. “Children” crayfish plan rarely enough – once every two years. Egg laying is done in the fall. Crustaceans hatch only in the summer.
Due to intensive capture, reduced water quality, active agricultural activity, the population of cancers decreased in times. Today, their appearance is considered rare, and everything is done, to save it. For catching crayfish, a penalty is imposed – 10 thousand. Australian dollars.
4th place: Coconut crab – 100 cm
Coconut Crab (or “Palm Thief”) – a lone cancer of the species decapod crayfish. It leads the land mode of existence. Lives in jungle islands of indian and pacific oceans.
The body consists of a powerful exoskeleton, front of 10 limbs and abdominal cavity. The first pair of legs is claws with which a palm thief can regale with coconuts, as well as capture.
The following two pairs are designed to move not only along horizontal, but also vertical surfaces. Fourth couple allows you to capture the inside of the shell or the rest of the coconut. The last pair of shortened legs has different meanings for both sexes. Females take care of the eggs with their help, and males mate.
“Palm thief” of cancer nicknamed because of the ability to mine coconuts directly from palm trees to sweat on the pulp. At the same time, scientists have proven that hermit cancer can only open scum.
Adults also include nuts, fruits, and seeds. Also edible for crayfish is considered the core of the fallen tree.
“Palm Thief” does not disdain cannibalism. Possessing excellent sense of smell, he quickly finds food.
In the breeding season, females go to the sea and lay eggs in water. The larvae hatch and then settle to the bottom. “Kids” are soft and defenseless. To be safe, hide in the empty mollusk shells. With age, they can reach up to 1 m in length.
Hermit crab lives in shallow burrows, the walls and bottom of which lined with coconut fibers. Can also dwell in crevices dried coral reefs. Often for housing can choose wood.
Palm thief meat is considered a rare delicacy, so it’s the animal is also in danger of extinction.
3rd place: American lobster – 107 cm
American lobster lives on the Atlantic North coast America. Prefers shallow water and secluded places capable of provide protection from enemies. It feeds on fish, shellfish, small crustaceans. He sleeps during the day, and at night shows violent activity.
Refers to the arthropod order of crustaceans. Can weigh up to 4 kg The size can be completely different. Standard – from 20 to 60 see. The exception is more than 1 m. It is considered the heaviest of Arthropod order.
It has ten pairs of legs. The first is equipped with claws for hunting and self defense. The rest are used for movement.
Prefers a hermit lifestyle. If he creates a family, then Relations with the spouse are not quite the usual way. Two lobsters will constantly be at odds with each other. Weaker retreat, but on an equal footing the battle will last until the first victory.
American lobster has keen eyesight and also has multifunctional mouth, which can not only eat, but also carry soil and move around when damaged limbs.
An animal can live up to 50 years.
Lobster meat is considered a popular delicacy. It is used in boiled food and steamed. Some people perform against catching lobsters for food, as they are cooked alive.
2nd place: Alaskan Kamchatka crab – 180 cm
Alaskan Kamchatka crab native to the Far East and North Pacific Ocean.
There are three varieties of this animal: gold and blue. royal as well as red king crab.
Attempts to resettle the last species in the Barents Sea for capture in Europe, carried out repeatedly. In 1932 he was absent reliable delivery method. In 1951, an attempt to similar reason. Only ten years later, director Far Eastern Fleet, Didenko, Yuri G. undertook a successful attempt to transport Alaskan Kamchatka crab by plane. because of acclimatization killed 90% of the eggs. Since then, only adults have been delivered. individuals.
Until 1977, the crab was imported by air, and only Then the railway was connected.
The population of these animals is growing rapidly, and now Alaskan Kamchatka crab comes to fishermen on the southwest coast in Norway.
Alaskan Kamchatka crab omnivorous. Feeds on clams, medium-sized crustaceans, sea urchins and acorns. Food torn by claws, and legs and jaws help to crush and grind it. The right claw is for solid food. Her crab splits shells, destroys the skeletons of marine organisms. Left exceptionally soft food hooks on a claw.
Unlike American lobster, Kamchatka crab has eyesight weak. Fails and flair. Therefore, he has to rely only on touch.
Also this animal, unlike its many distant relatives, can neither swim nor burrow into the ground. At the same time, this is a fairly quick view of crustaceans. Thanks powerfully developed legs, king crab can move quickly. Speed on a straight flat surface is 2 km / h. In connection with in a zigzag movement, the distance per day does not exceed 10-13 km
Crabs overwinter far from the coast at an average depth of up to 200 m. they do not go into hibernation, continuing to lead an active lifestyle. IN migration period, males and females separate and move parallel rows.
And only a month later, the mating season begins in the crabs, after which the female lays eggs on the abdominal legs. After mating individuals separate again, and again begin to migrate. Only now it’s not a search for housing, but feed.
Alaskan red Kamchatka crab is the largest subspecies. The width of the armor is 28 cm, the leg span is up to 180 cm. It weighs up to 12.7 kg.
1st place: Japanese spider crab – 600 cm
Japanese spider crab is the largest representative arthropods from a number of crustaceans in the world. Total body length may reach 6 meters, the span of the front paws – 3 meters. True, Karapaks not so “scale” and grows to 45 centimeters. Because of this Japanese spider crabs are not very “heavy”: as much as possible the registered weight was 20 kg.
It lives in the Pacific Ocean near the Japanese islands. Haven serves a rocky or sandy bottom at a depth of 150-300 m. during the mating season, individuals live in shallow water. He accounts for early spring, when fishing is prohibited.
Larvae grow at a temperature of 15-18 C. Temperature for survival is 11-20 C.
Japanese spider crab has a calm behavior. Main time devotes to the search for food, wandering along the seabed. Like Kamchatka a relative does not know how to swim. Eats alone in a lifestyle is a hermit. Despite the large size of the body, hunting is not engaged, preferring to eat carrion. Therefore, the taste of the spider crab bitter. Sometimes eats algae and small invertebrates.
The carapace throughout life does not change, but the legs with lengthen with age. Limbs help to climb elevations, but do not capture objects.
There is a legend that people this representative of crustaceans may be harmful, but it is not.
The life span is more than fifty years. If japanese crab spider contained in the terrarium, it can survive a century.
Attention! This rating is subjective, not advertising and does not serve as a guide to the purchase. Before the purchase consultation with a specialist is necessary.