Glossary
| A=Aquatic | living cheifly in water |
| B=Binocular | form of vision typical of mammals in which |
| D=Digit | finger or toe |
| E=Ecosystem | the enviornment which living and nonliving things interact |
| F=Fast Ice | sea ice which forms in polar regions |
| F=Flipper | a limb adapted for swimming |
| F=Floe | a sheet offloating ice |
| G=Gamete | a male or female reproductive cell |
| H=Haul-out | behavier of sea mammals pulling themselves ashore |
| L=Lead | a channel of open water between ice floes |
| M=Marine | living in the sea |
| O=Omnivore | an animal eating a varied diet including animal and plant tissue |
| P=Pelagic | the upper part of the open sea |
| R=Receptive | state of a female ready to mate |
| S=Sinus | a cavity in bone or tissue |
| S=Subadult | not an infant but not fully an adult |
| S=Subfamily | A division of a family |
| T=Terrestrial | living on land |
| U=Underfur | the thick soft undercoat of fur beneath the main layer of fur |
| V=Vector | an individual or species that caries a disease |