Eccentric Nature

Mating Habits of the Anglerfish 

They mate for life the hard way!

When the male finds a female, he bites into her skin, and releases an enzyme that digests the skin of his mouth and her body, fusing the pair down to the blood-vessel level. The male then slowly atrophies, first losing his digestive organs, then his brain, heart, and eyes, and ends as nothing more than a pair of testecals, which release sperm in response to hormones in the female’s bloodstream indicating egg release. This extreme sexual dimorphism ensures that, when the female is ready to spawn, she has a mate immediately available. Multiple males can be incorporated into a single female.

The spawn of the anglerfish of the genus Lophius consists of a thin sheet of transparent gelatinous material 0.6 or 0.9 metres (2 or 3 feet) wide and 7.6 to 9 metres (25–30 feet) long. The eggs in this sheet are in a single layer, each in its own cavity. The spawn is free in the sea. The larvae are free-swimming and have the pelvic fins elongated into filaments. Such an egg sheet is rare among fish.
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