sentence: Many freshwater crabs are endemic to small areas.
sentences_before: In total, there are about 6700 species of crab. Freshwater crabs show different behaviour than other crabs. Other crabs release a large number of larvae into the environment. These larvae need to cope on their own. In contrast, freshwater crabs care for the young.
sentences_after: This means there if there is a threat of the area of dissapearing, this also applies to the crab, which becomes threatened with extinction.
concept_name: freshwater crab
headings: Freshwater crab
categories: Crabs