Of the 160 Anglefish species, up to 25 species have bizarre mating behavior with tiny males using their thorns to plug into their offspring and transmit sperm and suck blood to the end of life.
The female Linophryne brevibarbata has the male plugged in under the abdomen
And this is the female Chaenophryne quasiramifera
Female Caulophryne pelagica
Bufoceratias shaoi female
Photocorynus spiniceps females have males plugged in at the top
The female Thaumatichthys binghami
Haplophryne mollis female
Female Melanocetus eustales
Female Himantolophus appelii
Female Lasiognathus amphirhamphus
