What are corals?

Corals are small colourful marine animals that are found in the seas. They build the coral reefs. Their exoskeletons provide the structure of the reefs. The reefs are of high ecological importance. Corals grow very slowly at the rate of about one centimetre a year.

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Where is the heart of a ‘shrimp’ located?

Shrimp is a kind of crustacean that occurs in all oceans, freshwater lakes and streams. Shrimps range in length from a few millimetres to more than 20 centimetres (about 8 inches). They are an important source of food for humans. The body of the shrimp has two main parts – the abdomen and the cephalothorax (head and thorax fused together). The cephalothorax is covered with a carapace. The heart is located in the cephalothorax.

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