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An egg case or egg capsule, often colloquially called a mermaid's purse, is the casing that surrounds the eggs of oviparous chondrichthyans. Living chondricthyans that produce egg cases include some sharks, skates and chimaeras. Egg cases typically contain one embryo, except for big skate and mottled skate egg cases, which contain up to 7 ...
While inside the case, the embryos have a whip-like extension on the tail believed to be used for circulating water. The newborns measure 93–102 mm (3.7–4.0 in) long and are perfectly formed miniatures of the adults. After hatching, the empty egg capsules often wash ashore and are known as "mermaid's purses". Growth is about 10 cm (3.9 in ...
Some species are oviparous, laying their fertilized eggs in the water. In most oviparous shark species, an egg case with the consistency of leather protects the developing embryo(s). These cases may be corkscrewed into crevices for protection. The egg case is commonly called a mermaid's purse.
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The eggs have an average diameter of 1 millimetre (0.039 in). The eggs are generally surrounded by the extraembryonic membranes but do not develop a shell, hard or soft, around these membranes. Some fish have thick, leathery coats, especially if they must withstand physical force or desiccation. These type of eggs can also be very small and ...
The look of the JW PEI purse is completed with chic gold hardware, a detail that offers the bag an upscale touch and makes it look a little more expensive than its totally sensible $32 sale price.
Egg case may refer to: Ootheca, an egg case made by some insects and molluscs; Egg case (Chondrichthyes), an egg case made by some sharks, skates, and chimaeras