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Clownfish

Clownfish

Safely living among the anemones, a clownfish swims in the warm waters off Papua New Guinea.

Fast FactsEdit

Type
Fish
Diet
Carnivore
Average life span in the wild
6 to 10 years
Size
4.3 in (11 cm)
Group name
School
Did you know?
Ironically, Finding Nemo, a movie about the anguish of a captured clownfish, caused home-aquarium demand for them to triple.

Anyone with kids and a DVD player probably thinks they know all there is to know about the clown anemonefish, or, simply, clownfish. What they may not know is that the heroes of Finding Nemo are actually called false anemonefish. True anemonefish, Amphiprion percula, are nearly identical, but have subtle differences in shape and live in different habitats.

Bright orange with three distinctive white bars, clown anemonefish are among the most recognizable of all reef-dwellers. They reach about 4.3 inches (11 centimeters) in length, and are named for the multicolored sea anemone in which they make their homes.

Clownfish perform an elaborate dance with an anemone before taking up residence, gently touching its tentacles with different parts of their bodies until they are acclimated to their host. A layer of mucus on the clownfish's skin makes it immune to the fish-eating anemone's lethal sting. In exchange for safety from predators and food scraps, the clownfish drives off intruders and preens its host, removing parasites.

There are 28 known species of anemonefish, most of which live in the shallow waters of the Indian Ocean, the Red Sea, and the western Pacific. They are not found in the Caribbean, Mediterranean, or Atlantic Ocean.

Surprisingly, all clownfish are born male. They have the ability to switch their sex, but will do so only to become the dominant female of a group. The change is irreversible.

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