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Swell sharks hunt at night for bony fish, molluscs, and crustaceans. [2] [3] They will eat prey that is dead or alive. [3] They feed either by sucking prey into their mouth or by waiting motionless on the sea floor with their mouth open, waiting to encounter prey. [2] [4] Swell sharks have also been known to look for food in lobster traps. [2]
Other common names for this species include flopguts (a reference to its ability to inflate), [4] Isabell's swell shark, nutcracker shark, rock shark, sleepy Joe, and spotted swellshark. [5] This species is almost identical to the draughtsboard shark ( C. isabellum ) of New Zealand ; the two species differ in coloration and the form of their ...
These sluggish, bottom-dwelling sharks are found widely in the tropical and temperate coastal waters of the Indian and Pacific Oceans. They have stocky, spindle-shaped bodies and short, broad, and flattened heads. The mouth is capacious, containing many small teeth and lacking furrows at the corners.
The illustration that accompanied Jordan and Fowler's 1903 species description. American ichthyologists David Starr Jordan and Henry Weed Fowler described the blotchy swellshark in a 1903 volume of Proceedings of the United States National Museum, based on a 98 cm (39 in) long stuffed dry skin originally obtained from Nagasaki, Japan.
For example, a large school of fish can cause nearby sharks, such as the lemon shark, to enter into a feeding frenzy. [1] This can cause the sharks to go wild, biting anything that moves, including each other or anything else within biting range. Another functional explanation for feeding frenzy is competition amongst predators. [2]
The whitefin swellshark (Cephaloscyllium albipinnum) is a species of catshark, belonging to the family Scyliorhinidae, endemic to southeastern Australia.It is found 126–554 m (413–1,818 ft) down, on the outer continental shelf and upper continental slope.
The largest sea lions are Steller's sea lions, which can weigh 1,000 kg (2,200 lb) and grow to a length of 3.0 m (10 ft). Sea lions consume large quantities of food at a time and are known to eat about 5–8% of their body weight (about 6.8–15.9 kg (15–35 lb)) at a single feeding.
California sea lions feed on a number of species of fish and squid, and are preyed on by orcas and great white sharks. California sea lions have a polygynous breeding pattern. From May to August, males establish territories and try to attract females with which to mate. Females are free to move in between territories, and are not coerced by males.