(Photo found here)

The Port Jackson shark (Heterodontus portusjacksoni) is a nocturnal, oviparous (see this post) type of bullhead shark of the family Heterodontidae, found in the coastal region of southern Australia, including the waters off Port Jackson. It has a large head with prominent forehead ridges and dark brown harness-like markings on a lighter grey-brown body. Port Jackson sharks can grow up to 5.5 ft. The Port Jackson shark is a migratory species, traveling south in the summer and returning north to breed in the winter months. They feed on hard-shelled mollusks, crustaceans, sea urchins, and fish. Port Jackson Sharks are quite distinctive blunt headed-sharks that lay eggs. Port Jackson Sharks have harness-like markings which cross the eyes, run along the back to the first dorsal fin, then cross the side of the body. This pattern makes it very easy to identify this species.

(Source)

(Source of photo here) Juvenile tiger shark, Galeocerdo cuvier, Bahamas (Atlantic) (see this post)

bewareofsharks:Yin and Yang (by Paul Cowell)

Whale sharks (see this previous post)

(Photo found here)

Happy Mother’s Day :)

Mother and baby sperm whales (see this previous post)

Sperm whale society is matrilineal (grandmothers, mothers, and their daughters live together for life). Sperm whale mothers are pregnant for about 16 months. Calves are born at about 4 meters long and weigh around one ton. Sperm whale calves suckle for at least three years, during which time they do not dive deeply to feed on squid with their mothers. As a result, at least one of the calf’s family members remains at the surface to “babysit.”

(Source)

(Source of photo here) Caribbean reef shark (see this post)

earth-song: Lion Fish with Sunburst” by Jonathan Lin

Lion fish (see this previous post)