Crab
Автор: Animal World Scenes
Загружено: 2026-01-06
Просмотров: 21
Описание: Crabs are decapod crustaceans, either the Brachyura (the "true crabs") or various groups within the closely related Anomura, characterised by having a heavily armoured shell, their tail segments concealed under the body, the ability to run sideways, and the habit of hiding in rocky crevices. They do not form a single natural group or clade, but have convergently evolved multiple times from the ancestral decapod body plan through the process of carcinisation. As a group they are thus polyphyletic.
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