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Under H2O

Into the Mangrove Forest

5:45

The mangrove forest is a place of amazement both above and below the waterline. Mangroves have the unique ability to live in salt water, and they use their highly specialized roots to filter salt, inhale oxygen, and extract nutrients from an environment that other trees can not tolerate. The world within the tangled mess of mangrove roots is dark, silty, eerie, and wonderful.

Episodes of Under H2O9

Video thumbnail: Under H2O Damselfish in Distress

Under H2O

Damselfish in Distress

Male damselfish try in vain to protect a brood of eggs from a saddle wrasse assault.

5:38

Damselfish in Distress

5:38

Video thumbnail: Under H2O The Power of Waves

Under H2O

The Power of Waves

The UnderH2O crew ventures out into Waimea Bay to explore the science of big waves.

7:27

The Power of Waves

7:27

Video thumbnail: Under H2O The Microscopic World of Corals

Under H2O

The Microscopic World of Corals

Scientists view coral under a laser scanning confocal microscope.

8:35

The Microscopic World of Corals

8:35

Video thumbnail: Under H2O Blackwater Drift Dive

Under H2O

Blackwater Drift Dive

The Under H2O crew journeys far offshore for a midnight blackwater drift dive.

5:20

Blackwater Drift Dive

5:20

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