Category: Fishery
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Egg Case (mermaid’s Purse)
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 embryos.[1] Oviparity is completely absent in the superorder Squalomorphii.[2][3] Egg cases are also thought to have been produced by some extinct…
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Humans have been interested in echinoid fossils (the fossilised remains of sea urchins) for millennia, considering them lucky and imbuing them with magical powers linked to their deities
A folk tradition in Denmark and southern England imagined sea urchin fossils to be thunderbolts, able to ward off harm by lightning or by witchcraft, as an apotropaic symbol. Another version supposed they were petrified eggs of snakes, able to protect against heart and liver disease, poisons, and injury in battle, and accordingly they were carried as amulets. These were,…
