squalomorphii

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View of a saw-shark from below, Pristiophoridae Royalty Free Stock Photo
   
   
   
   
   
   
Egg casing of a Ray fish also known as Mermaids Purse.
   
   
   
   
   
   
   
An egg case or egg capsule is the casing that surrounds the eggs of oviparous sharks, skates and chimaeras. Egg cases typically contain one embryo, except for big skate and mottled skate egg cases, which contain up to 7 embryos. Oviparity is completely absent in the superorder Squalomorphii.


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