On this Wikipedia the language crab apple indian pickle are at the top of the page across from the article title. Crabs are found in all of the world’s oceans, as well as in fresh water and on land, particularly in tropical regions.

About 850 species are freshwater crabs. Crabs often show marked sexual dimorphism. Pheromones are used by most fully aquatic crabs, while terrestrial and semiterrestrial crabs often use visual signals, such as fiddler crab males waving their large claws to attract females. When development is complete, the female releases the newly hatched larvae into the water, where they are part of the plankton.

After one more moult, the crab is a juvenile, living on the bottom rather than floating in the water. After living for a short time as larvae in the ocean, the juveniles must do this migration in reverse. In many tropical areas with land crabs, these migrations often result in considerable roadkill of migrating crabs. Once crabs have become juveniles, they still have to keep moulting many more times to become adults.

They are covered with a hard shell, which would otherwise prevent growth. The moult cycle is coordinated by hormones. When preparing for moult, the old shell is softened and partly eroded away, while the rudimentary beginnings of a new shell form under it. Crabs are mostly active animals with complex behaviour patterns such as communicating by drumming or waving their pincers. Crabs tend to be aggressive toward one another, and males often fight to gain access to females. Crabs are known to work together to provide food and protection for their family, and during mating season to find a comfortable spot for the female to release her eggs. A short video on catching and exporting shellfish in Wales.