Also known as white whales, belugas and other marine animals in the Arctic and Antarctic have few problems with parasitic infections. This is either because of cold water temperatures, lower numbers of hosts or a combination of the two.

Although occasionally seen in the tropics, most killer whales are found in the upper ocean layers of cooler coastal regions. Some killer whale groups (called pods) mainly eat seals. These dietary preferences are why members of this species are found in Arctic waters, where some seal species are present year round. Male killer whales tend to be more full-bodied than females, along with a taller dorsal (back) fin.

The short spined starfish is a coldwater species found in the northern waters from the Arctic to Cape Hatteras. They can be seen in a wide range of colors from orange to red, purple, yellow, and white. Dark red varieties are sometimes known as blood stars. They can be found scavenging along the rocky sea bottom.