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  2. Egg case (Chondrichthyes) - Wikipedia

    en.wikipedia.org/wiki/Egg_case_(Chondrichthyes)

    The bamboo sharks (Hemiscylliidae) and the zebra shark (Stegostomatidae) lay eggs on the bottom, while the other carpet sharks give live birth. The egg cases are oval and covered with adhesive fibers that serve to secure them to the bottom.

  3. Hammerhead shark - Wikipedia

    en.wikipedia.org/wiki/Hammerhead_shark

    The hammerhead sharks exhibit a viviparous mode of reproduction with females giving birth to live young. Like other sharks, fertilization is internal, with the male transferring sperm to the female through one of two intromittent organs called claspers. The developing embryos are at first sustained by a yolk sac.

  4. Shark anatomy - Wikipedia

    en.wikipedia.org/wiki/Shark_anatomy

    This then allows the female to give birth to live young, although some do lay eggs. This image depicts a squalus acanthias shark dissection where this female happened to be pregnant with multiple shark pups. This image is important as it shows how sharks can give birth to multiple live young. [20]

  5. Bull shark - Wikipedia

    en.wikipedia.org/wiki/Bull_shark

    Bull sharks mate during late summer and early autumn, [10] often in bays and estuaries. [57] After gestating for 12 months, a bull shark may give birth to 1 to 13 live young. [10] [58] They are viviparous, born live and free-swimming. The young are about 70 cm (27.6 in) at birth.

  6. Fish reproduction - Wikipedia

    en.wikipedia.org/wiki/Fish_reproduction

    The males do not have to compete with other males, and female anemone fish are typically larger. When a female dies a juvenile (male) anemone fish moves in, and "the resident male then turns into a female and reproductive advantages of the large female–small male combination continue". [22] In other fishes sex changes are reversible.

  7. Lemon shark - Wikipedia

    en.wikipedia.org/wiki/Lemon_shark

    Lemon sharks congregate for reproduction at special mating grounds. [29] Females give birth to their young in shallow nursery waters to which they are philopatric. Lemon shark young are known as pups and they tend to remain in the nursery area for several years before venturing into deeper waters. [30]

  8. Sand tiger shark - Wikipedia

    en.wikipedia.org/wiki/Sand_tiger_shark

    After a lengthy labour, the female gives birth to 1 m (3.3 ft) long, fully independent offspring. The gestation period is approximately eight to twelve months. These sharks give birth only every second or third year, [18] resulting in an overall mean reproductive rate of less than one pup per year, one of the lowest reproductive rates for sharks.

  9. Scalloped hammerhead - Wikipedia

    en.wikipedia.org/wiki/Scalloped_hammerhead

    Scalloped hammerheads give live birth. Compared to other species, the scalloped hammerhead produces large litters (12–41 pups), [ 21 ] and this is most likely due to high infant mortality. Like most sharks, parental care is not seen. [ 22 ]