Strange Fish Have Sex in the Head Equipment

Phallostethus cuulong is one weird fish found in Southeast Asia. Males only 2 cm long fish has genitals on their heads.

Phallostethus cuulong is one type of fish priapium, named after the ancient Greek god of fertility, Priapius. These fish entered in the family Phallostethidae.

The species was discovered in 2009 by Koichi Shibukawa Nagao Natural Environment Foundation of Japan in the Mekong River, Vietnam.

Male genitalia Phallostethus cuulong not a penis, but priapium. This tool is actually a tubular muscle is a modification of the chest and pelvic fins.

Priapium has 2 parts. Near the end, there is a jagged saw a similar part, called ctenactinium. At the front, there are rod-shaped part called toxactinium.

No one had ever seen this fish breeding. However, male genitals allegedly used to hold the female during mating before finally transferring sperm.

To assist in this task, usually priapium leaning in one direction. Phallostethus cuulong found Shibukawa priapium all have a leaning to the right.

Lynne Parenti of the Smithsonian Institution in Washington said, is not known why these fish have evolved genitalia in the head.

However, Phallostethus cuulong just one type of group Atherinomorpha fish, fish fins modify the genitals.

At Phallostethus cuulong, not just the genitals in the head. Mouth and anus were located in that section. U-shaped channel cernanya

"There are many things that led to the back of the fish,