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The egg case is very smooth and lacks external fibrous material. [1] This egg case can be easily identified from all others in that it is the only one to have a steep ridge; giving the case a convex shape. [1] The keel on the egg case is considered very broad; representing 30–33% of the width of the egg case. [1]
The egg case of the puffadder shyshark has a different color pattern than those of other shysharks. The puffadder shyshark is oviparous; there is no distinct breeding season and reproduction occurs year-round. [14] Females deposit egg capsules one or two at a time, attaching them to vertical structures such as sea fans. [12]
This shark is found in the deep waters off northwestern Australia. [ 2 ] [ 3 ] The species name refers to the ridges on the egg case . Egg cases belonging to this species had been documented as early as the 1980s, but could not be matched to any species of Australian shark until scientists examined a shark specimen of previously uncertain ...
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The horn shark is a sporadic swimmer that prefers to use its flexible, muscular pectoral fins to push itself along the bottom. It is usually solitary, though small groups have been recorded. [ 2 ] During the day, horn sharks rest motionless, hidden inside caves or crevices, or within thick mats of algae, though they remain relatively alert and ...
Egg case with yolk. The swell shark is oviparous, laying two green or amber flattened eggs at a time. [1] [3] Fertilization occurs internally. [5] The egg cases become attached to kelp or the reef with tendrils. It has been suggested that the length of the tendrils depends on the amount of surf action the region is under. [4]
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The zebra shark is oviparous, with females laying large egg capsules measuring 17 cm (6.7 in) long, 8 cm (3.1 in) wide, and 5 cm (2.0 in) thick. The egg case is dark brown to purple in color, and has hair-like fibers along the sides that secure it to the substrate. [3]