- Description
Crabs are generally covered with a thick exoskeleton, composed primarily of highly mineralized chitin. Behind … See more
Crab - Wikipedia
Crabs are decapod crustaceans of the infraorder Brachyura (meaning "short tail" in Greek), which typically have a very short projecting tail-like abdomen, usually hidden entirely under the thorax. They live in all the world's oceans, in freshwater, and on land, are generally covered with a thick exoskeleton, and have a single pair of pincers on each arm. They f… See more
Sexual dimorphismCrabs often show marked sexual dimorphism. Males often have larger claws, a tendency that is particularly pronounced in the fiddler crabs of the genus Uca (Ocypodidae). In fiddler crabs, males have one greatl… See more
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King crab - Wikipedia
King crabs are decapod crustaceans in the family Lithodidae that are chiefly found in deep waters. King crabs are not true crabs and are generally thought to be derived from hermit crab ancestors within the Paguridae, which may explain the asymmetry still found in the adult forms. This ancestry is supported by several anatomical peculiarities which are present only in king crabs and hermit crabs…
Wikipedia · Text under CC-BY-SA licenseFreshwater crab - Wikipedia
WEBFreshwater crab. Around 1,300 species of freshwater crabs are distributed throughout the tropics and subtropics, divided among eight families. They show direct development and maternal care of a small number of …
Crab - Simple English Wikipedia, the free encyclopedia
WEBLearn about crabs, a form of decapods with eight legs and two claws. Find out their structure, food, evolution, and how they are eaten and prepared.
Crab | Marine, Edible & Adaptable Crustacean | Britannica
- crab, any short-tailed member of the crustacean order Decapoda (phylum Arthropoda)—especi…
Unlike those of other decapods (e.g., shrimp, lobster, crayfish), crabs’ tails are curled under the thorax, or midsection. The carapace (upper body shield) is usually broad. The first pair of legs is modified into chelae, or pincers. - Britannica Quiz
Deadliest Animals Quiz
- Published: May 4, 1999
- crab, any short-tailed member of the crustacean order Decapoda (phylum Arthropoda)—especi…
crab summary | Britannica
WEBcrab, Any of 4,500 species of short-tailed decapod, found in all oceans, in freshwater, and on land. Its carapace (upper body shield) is usually broad, and its first pair of legs is …
Crab - Encyclopedia.com
WEBMay 9, 2018 · Crabs include well-known crustaceans such as the blue crab, the Dungeness crab, Sally lightfoot and the spider crabs. They are among the most successful of all …
Crab: Everything You need To Know - Ocean Insider
WEBMay 10, 2023 · What is Crab? Crabs are a diverse group of decapod crustaceans found in the world’s oceans, freshwater, and land. They are known for their distinctive morphology, characterized by a thick …
Crustacean - Wikipedia
WEBThe 67,000 described species range in size from Stygotantulus stocki at 0.1 mm (0.004 in), to the Japanese spider crab with a leg span of up to 3.8 m (12.5 ft) and a mass of 20 kg (44 lb). Like other arthropods, crustaceans …
The Ancient Odyssey of Crabs - Natural History Museum
WEBNov 29, 2023 · These fossil crab specimens allowed researchers to mark out the steps along the path from (and back to) life in the oceans by capturing evolutionary events and tying them to specific points and …
Freshwater crab - Simple English Wikipedia, the free encyclopedia
WEBFreshwater crabs are crabs that live in fresh water, mostly in the tropics and subtropics. About 1300 species of freshwater crab have been described. In total, there are about …
Crustacean - Simple English Wikipedia, the free encyclopedia
WEBMost crustaceans are aquatic, mostly marine. Some have moved onto land permanently. Crustaceans that live on land include some crabs, and woodlice. Crustacea range in …
A Guide to the Different Types of Crab - American Oceans
WEBFrom the giant Japanese Spider Crab to the small European Green Crab, this article takes a closer look at the most popular types of crab and their physical characteristics, making it …
Hermit crab - Wikipedia
WEBHermit crabs are anomuran decapod crustaceans of the superfamily Paguroidea that have adapted to occupy empty scavenged mollusc shells to protect their fragile exoskeletons. …
20 Different Types of Crabs: Facts, Pictures & Chart - Outforia
WEBSep 18, 2022 · Crabs have even been around about 200 million years before the dinosaurs! There are over 4,500 types of crabs across the globe, and over 850 different species. If …
Coconut crab - Simple English Wikipedia, the free encyclopedia
WEBThe coconut crab (Birgus latro) is a large edible land crab related to the hermit crab. Coconut crabs are found in the tropical parts of the Indian and Pacific Oceans . Although …
Coconut crab - Wikipedia
WEBThe coconut crab (Birgus latro) is a terrestrial species of giant hermit crab, and is also known as the robber crab or palm thief.It is the largest terrestrial arthropod known, with a …
Fiddler crab - Wikipedia
WEBThe fiddler crab or calling crab can be one of the hundred species of semiterrestrial marine crabs in the family Ocypodidae. [2] These crabs are well known for their extreme sexual …
Hermit crab - Simple English Wikipedia, the free encyclopedia
WEBThe hermit crab is a type of crab that does not have a hard shell. They use old shells for protection. They especially like old whelk shells. When the hermit crab grows in size, it …
Crab meat - Wikipedia
WEBCrab meat or crab marrow is the meat found within a crab, or more specifically in the leg of a crab. It is used in many cuisines around the world for its soft, delicate and sweet flavor. …
Horseshoe crab - Wikipedia
WEBHorseshoe crab. Jurassic-aged limulids. Crenatolimulus (A,B), Limulus (C), Mesolimulus (D,E) Horseshoe crabs are arthropods of the family Limulidae and are the only surviving …
Fiddler crab - Simple English Wikipedia, the free encyclopedia
WEBA fiddler crab, also called a calling crab, is a land crab that lives in mud or sand flats near the beach. The reason this crab is called a fiddler crab is because it holds its large …
Portunus trituberculatus - Wikipedia
WEBPortunus trituberculatus. (Miers, 1876) Synonyms [1] Neptunus trituberculatus Miers, 1876. Portunus trituberculatus, also known as the gazami crab, Asian blue crab or horse crab, …
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