Pinnipeds originated from “bear-like” carnivore ancestors approximately 30million years ago during the late Oligocene/early Miocene eras. Occasional visitors to our beaches are Sub-Antarctic Fur Seals (Arctocephalus tropicalis) and Southern Elephants Seals (Mirounga leonina).
Like other mammals, including humans, they breathe air. They need to rest, digest and reproduce on land. Seals depend on auditory (hearing), visual (seeing) and tactile (touching) senses to locate prey (unlike dolphins which use echo location). Our cape fur seals are opportunistic feeders of fish, cephalopods (squid/octopus) and crustacean (crabs/crayfish).
Cape Fur Seals (Arctocephalus pusillus) are residents of Mossel Bay. They have brown fur with fore and hind flippers, external ears, a small tail and powerful necks. Their sleek, streamlined bodies enable them to move through the water with minimum drag and the least expenditure of energy. Their long fore flippers are used for propulsion while the hind flippers act as stabilizers.
Seals have an acute sense of smell on land to recognise other seals, bond with pups and detect females in oestrus. They have good eyesight on land and in the ocea. Their bodies have evolved various structural features to cope with the enormous pressure of deep dives (50-160m for 7min) and low oxygen levels.
On land they create momentum by swinging their strong necks from side to side.
Females are roughly 1,5m and weigh approximately 75kg. Males may exceed 2m and weigh 190kg. A single pup is born between November and December.
Man is the greatest threat to Cape Fur Seals. We discard plastic and other pollutants into the ocean causing thousands of seal and other marine deaths through strangulation or entanglement.
Seals found on our beaches should be monitored for 3 days if they are uninjured. If they are injured, inform your nearest Conservancy. Please do not harass resting seals. They are dangerous when confronted.
Dana Bay Conservancy Emergency Number: 044-698 2133