@The_Catman I believe the anglerfish has external fertilization outside the body. So the males that are near egg laying orifice are more likely to father offspring. As such evolution has made them more likely to end up on the underside near it. But occasionally they attach in other places.
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@The_Catman I believe the anglerfish has external fertilization outside the body. So the males that are near egg laying orifice are more likely to father offspring. As such evolution has made them more likely to end up on the underside near it. But occasionally they attach in other places.