There he did research on a number of marine mammals.

A field guide to the marine mammals of the world.

And that knowledge, he added, is giving scientists new ways to take better care of marine mammals.

Three species are known to use marine mammals as hosts.

The impact on marine mammals by this system was certainly not a consideration.

The problem with this is that marine mammals need open water in the winter to survive.

Whales are large marine mammals which live in the ocean.

The animals expected to meet such grand expectations are among the most common of marine mammals.

The result is an intense debate over the future of the marine mammal.

But they serve as meals for many fish, marine mammals and birds.

Humans have caused many problems for marine mammals and birds.

The park is one of the best places in the city to view wildlife, especially birds and marine mammals.

These significant differences over a small geographical distance have not been found in any other studies of marine mammals.

Marine mammals are able to dive for long periods of time.

Marine mammals have proven to be resources of great international significance.

Dolphins are endangered marine mammals and of no commercial value.

Discover where fish and marine mammals spend the cooler months.

However, it may also prey on marine mammals such as seals.

The Russian military is believed to have closed its marine mammal program in the early 1990s.

Most of the marine mammals and a large sea turtle survived.

However, it is controversial because of the marine mammals' need for large spaces.

The death has raised questions about using such marine mammals in amusement parks.

Q:Are there any good field guides to marine mammals available?

The Navy did many tests with several marine mammals to determine which would be best for the jobs they needed done.

For these reasons, some scientists regard it as a marine mammal.