Dec 30, 2012 | root_ks8kzico

Countdown to 2013: December 30

Coral Reef - Coral reefs are typically found at a depth less than 150 feet so that they are reachable by sunlight. - Corals contain microscopic algae called zooxanthellae that provide the coral with food and give them their vibrant colors - Coral grows on average about 1 mm to 4cm per year. - Coral reefs cover less than 0.2% of our oceans but they contain 25% of the world's marine fish species!

Up Next...

A sea turtle uses its fin to grasp onto another turtle in the water.
Photo of the Month: September 2026
On a pelagic trip off the coast of Huatulco in Mexico’s Oaxaca state, we saw numerous seabirds, but I hadn’t expected to encounter so many adult sea turtles. Most would sense the boat and quickly dive
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Close-up of a king protea flower in bloom
Photo of the Month: August 2026
Both of these photos were taken on a trip based on Holbrook’s “South Africa: Gardens, Parks, Wine Country and the Wildflower Super Bloom!” arranged by Sandy Schmidt. The trip was timed for the spring
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A Galapagos Penguin mid-jump over volcanic rock and seawater.
A llama stands on a path with the stone walls of an archaeological site in the background.
A woolly monkey balances in the branches of a tree, its limbs outstretched and tail wrapped around a branch overhead.
A group of Holbrook staff members pose and smile at the camera outdoors.
Multiple people on a forest trail look through binoculars and scopes at something outside the frame.
Side view of an adult hippo and calf partially submersed in water.
An elevated walkway surrounded by low trees and shrubs with a lake in far background and blue sky with puffy clouds.
Staff member Jamie DeVoe poses on an overlook with a volcano and town in the background.
Office building with elevated deck and tiered landscaping.
Selfie of staff members Kevin Van Dien and Sandy Schmidt smiling.
A motmot perches on a tree branch.
Upward view of 12 people standing in a circle, smiling down at the camera, with an ornate ceiling above them.
A Geoffroy's tamarin sits on a tree branch with its mouth open.
A golden lion tamarin sits on a tree branch.
Close-up of a king protea in bloom.
Staff member Jill Hays standing behind a conference table decorated with Holbrook-branded signs and handouts.
Selfie of Holbrook guide Iván Castillo in the rainforest.
A sea turtle uses its fin to grasp onto another turtle in the water.
Underwater shot of a person snorkeling near a large school of fish.