The tropical seas with their colourful coral reefs are one of the most conspicuous habitats of the world. The bizarre-shaped coral reefs provide home to many colourful fish, snails, sea urchins, prawns, and shells. Other inhabitants are also present in the water—sea turtles, whose armour is flatter than that of the land turtles, hammerhead sharks with their hammer-shaped broad head, and some other animals that are even more dangerous than sharks.
