Most members of the order inhabit deep-sea environments.

This unusual adaptation is likely a response to the difficulty of finding a mate in their dark and sparsely inhabited deep-sea environment.

The United States pavilion is a showcase for American technology in diving, charting the ocean bottom and protecting the deep-sea environment.

Both kinds have Cambrian representatives and both flourish today, the glass sponges being especially numerous in deep-sea environments.

As more information is gathered, the deep-sea environment becomes more comparable to a highly diverse terrestrial environment such as tropical rainforests.

Dr. Kennish has conducted biological and geological research on estuarine, coastal ocean, and deep-sea environments for more than 30 years.

Readings so far have been normal for the deep-sea environment, officials indicated.

The overlying Rincon Formation, a shale deposited in a deep-sea environment, serves as an impermeable cap.

Perhaps the Coelecanth with it's long life span has remained the way it is because it inhabits a deep-sea environment that changes very slowly.

This is unusual compared to samples of sediment from other deep-sea environments, where the percentage of organic-walled foraminifera ranges from 5% to 20%.