Shark Birth Pictures

 
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Photos of Shark Birth, and Egg Cases

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Depending on the species, sharks are either born from eggs laid in egg cases or are born alive. About 100 shark species lay eggs in egg cases. This method of reproduction is called oviparity. Egglaying, or oviparous sharks, include bullhead sharks, such as the Port Jackson shark and the Zebra shark, and some carpetsharks and cat sharks. Unlike bony fish, which lay eggs that are fertilized outside the female's body, the male shark fertilizes the eggs within the female's body, and the eggs are then deposited in an egg case, which is expelled into the sea, where it attaches to algae or coral. The egg case is soft and flexible at first, but hardens in the water. The young develop inside the eggs, hatch, and leave behind an empty egg case, which often floats onto shore. An opening in the empty egg case is evidence the sharks hatched and dispersed.

Sharks that are not born from eggs in egg cases are born alive. There are two ways in which live birth reproduction is accomplished among sharks. The most common way is called ovoviviparity. Ovoviviparous sharks have eggs that develop within the mother's body. The eggs are fertilized internally and the developing sharks are nourished by the egg yolks. The young hatch within the oviduct and continue to receive nourishment from the remainder of the egg yolk, still attached to their body, as well as from fluids secreted into the oviduct. Some species of shark are cannibalistic, feeding on other eggs and embryos within the oviduct. Only a small number of these pups survive until birth. The young are then born live, and are fully functional. Most sharks are ovoviviparous, including great white sharks, mako sharks, nurse sharks, tiger sharks, and many others.

The other live birth method is called viviparity. The eggs of viviparous sharks are fertilized within the mother's body, and the young are nourished by a placenta. The placenta is formed when the yolk sack comes into contact with the uterine wall. The placenta transfers nutrients to the young using the blood streams of the mother and babies, similar to the way mammal babies are nourished. The uterine wall also secretes fluids that are absorbed into the yolk stalk to nourish the developing pup. The young are then born live and fully developed. Viviparous sharks include bull sharks, whitetip reef sharks. lemon sharks, blue sharks and hammerheads, among others.

 

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picture of pregnant blacktip shark picture of lemon shark after giving birth Picture of zebra shark egg case picture of live birth of lemon shark

Picture of pregant blacktip shark, Carcharhinus limbatus, Bahamas, Caribbean Sea

Picture #: 000605

Photo of lemon shark, Negraprion brevirostris, female swimming through shallow water after giving birth, Bahamas, Caribbean Sea

Picture #: 000799

Stock image of a zebra shark egg case, Stegastoma fasciatum, Brisbane, Queeensland, Australia

Picture #: 001251

Picture of live birth of a lemon shark, Negraprion brevirostris, as pup emerges tail first, wrapped in chorionic membranes, Bahamas, Caribbean Sea

Picture #: 001956

picture of newborn lemon shark picture of birth of lemon  shark picture of newborn lemon shark picture of live birth of lemon shark

Picture of newborn lemon shark, Negraprion brevirostris, with umbilicus, placenta, and chorionic membrane still attached. Sharksuckers, also known as remoras, Naucrates ductor, cling to mother, Bahamas, Caribbean Sea

Picture #: 003112

Photo of birth of a lemon shark, Negraprion brevirostris, pup's tail emerges from mother's cloaca wrapped in birth sac. Sharksuckers, also known as remoras, Naucrates ductor, break and eat umbilical cord, Bahamas, Caribbean Sea

Picture #: 003113

Stock image of newborn lemon shark, Negaprion brevirostris, swimming away from its mothe. Sharksuckers Sharksuckers, also known as remoras, Naucrates ductor, cling to mother, Bahamas, Caribbean Sea

Picture #: 003115

Picture of live birth of lemon shark, Negraprion brevirostris, pup emerges from mother's cloaca and turns to swim away. Sharksuckers, also known as remoras, Naucrates ductor, cling to mother, Bahamas, Caribbean Sea

Picture #: 003116

picture of lemon shark dropping a litter of pups piture of tail of pup protruding from lemon shark during live birth picture of lemon shark and new born pup picture of newborn lemon shark

Picture of lemon shark, Negraprion brevirostris, swimming through shallow lagoon, dropping a litter of pups, Bimini, Bahamas, Caribbean Sea

Picture #: 005590

Photo of tail of pup protruding between pelvic fins of mother during live birth of lemon shark, Negaprion brevirostris, Bimini, Bahamas, Caribbean Sea

Picture #: 005591

Stock image of lemon shark and newborn pup, Negaprion brevirostris, Bimini, Bahamas, Caribbean Sea

Picture #: 005593

Picture of newborn lemon shark with umbilicus, placenta, and chorionic membrane still attached, Negaprion brevirostris, Bimini, Bahamas, Caribbean Sea

Picture #: 005594

picture of newborn lemon shark swimming to mangroves picture of researcher holding newborn tiger shark picture of embryo of shark in egg case picture of eight near-term bull shark embryos removed from captured mother

Picture of Negraprion brevirostris, newborn lemon shark pup, swimming away from mother after birth in shallow lagoon, towards safety of mangroves, Bahamas, Caribbean Sea

Picture #: 005599

Photo of researcher holding newborn tiger shark, Galeocerdo cuvier, next to mother, captured for University of Miami research, both released alive, Bahamas, Caribbean Sea

Picture #: 006562

Stock image of embryo of a shark visible inside egg case, Spain, Atlantic Ocean

Picture #: 006722

Picture of bull shark litter of eight pups, Carcharhinus leucas, near-term embryos removed from captured female, Bahamas, Caribbean Sea, Atlantic Ocean

Picture #: 008745

picture of egg case of horn shark picture of researcher holding newborn tiger shark egg case of blotchy swell shark picture of velvet belly lanternshark mother and embryo

Picture of egg case of horn shark, Heterodontus francisci, California, East Pacific Ocean

Picture #: 009596

Photo of California swell shark, Cephaloscyllium ventriosum, emerging from camouflaged egg case, California, East Pacific Ocean

Picture #: 009718

Stock image of egg case of blotchy swell shark, also known as draughtsboard shark, Cephaloscyllium umbratile, Izu Ocean Park, Izu Peninsula, Japan, Pacific Ocean

Picture #: 009722

Picture of velvet belly lanternshark, Etmopterus spinax, adult and embryo with yolk sac placenta attached, Israel, Mediterranean Sea

Picture #: 009897

picture of unborn velvet belly lanternshark picture of pregnant sand tiger shark picture of the egg case of a leopard catshark picture of the egg case of a leopard catshark

Picture of unborn velvet belly lanternshark, Etmopterus spinax, with yolk sac placenta attached, Israel, Mediterranean Sea

Picture #: 009898

Photo of pregnant female sand tiger shark, also know as gray nurse shark, Carcharias taurus, North Carolina, Atlantic Ocean

Picture #: 011316

Stock image of the egg case of a leopard catshark, Poroderma pantherinum, in a controlled incubator

Picture #: 018085

Picture of egg cases of a leopard catshark, Poroderma pantherinum, in a controlled incubator

Picture #: 018118

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