Great Barrier Reef corals

Corals of the Great Barrier Reef.

Paradise Bay ice floe

Paradise Bay is a notch in Antarctica's Trinity Peninsula and is guarded by two islands that separate it from Gerlache Strait and the much larger Anvers Island.

Coral reef

One of the main reasons why coral reefs attract so many diverse organisms is because of the abundant food supply that the reef provides. The small fish (herbivores) that feed on the algae (autotrophs) within the coral, attract larger fish (primary carnivo

Starfish and anemones

This photograph of a starfish and anemones in a cold water rocky community was taken in February of 1988 off the coast of Massachusetts.

Brain coral

The lights of the camera bring out the brilliant colors of the reef. The brain coral serves as a focus for this thriving reef community.

Snowmelt waterfall

A view of meltwater cascading over Proterozoic sedimentary rocks in Montana's Glacier National Park.

Nantucket marshland

Marshland in Nantucket.

Water quality survey

Survey of water quality in a mine water filtration pond.

Cypress swamp

Cypress swamp at Horseshoe Lake.