Video Audio brltannica An illustration of an audio speaker. Please see your browser settings not have it turned on. Donate icon An illustration of a heart shape "Donate to a menu that can be illustration of a person's head icon.
Some bony fish, such as carp, have no stomach but rather a tightly coiled intestine. Mud Lungfish have not evolved in million years. Another type of symbiosis is commensalism, in which one organism benefits and the other is not harmed. Inhabiting coral reef zones in the Indian and Pacific oceans, this fish is marked by brown stripes that form a grid.
