[00:00.010]Some take comfort in their bold appearance.
[00:03.576]But others take shelter in the coral.
[00:06.089]Such as these sedentary and appropriately named Christmas tree worms,
[00:10.960]filtering food from the gentle currents.
[00:13.652]For many,
[00:14.495]entire lives are played out within the clumps of coral.
[00:18.245]Mandarin fish.
[00:19.736]A dozen of them may inhabit one outcrop.
[00:22.268]Males are always on the hunt for a mate.
[00:24.672]And competition is fierce.
[00:27.375]Disputes start with a polite warning.
[00:30.132]The rising dorsal fin is a clear signal to back off.
[00:34.124]But sometimes, going for the jugular is the only way.
[00:37.631]The fight over, it's time to get down to business.
[00:45.098]Spawning is a brief affair.
[00:48.485]Then the eggs are left to the mercy of the current.