Triplewart Seadevil Fish Sexual Dimorphism

Did you know? In an extreme case of  reverse sexual dimorphism the male is so small that it attaches itself to the female as a parasite.
Sexual dimorphism is the difference between (morphology) – structure and specific structural features  between male and female of the same sepecies. It includes difference in size, coloration or body structure between males and females. For example the peacock (male) is best known for the male’s extravagant eye-spotted tail which is absent in the peahen (females). In most cases the males are larger than the females. But in some cases the females are larger, if the females are larger then it is termed as reverse sexual dimorphism. The triplewart seadevil fish exhibits an extreme case of reverse sexual dimorphism. The size of the females is approximately 30 cm and the male is about 3 cms in size. The triplewart seadevil fish belongs to the anglerfish family. The male may have trouble finding food in the deep sea. Furthermore, the growth of the digestive tract of some males becomes stunted, preventing them from feeding. These features necessitate his quickly finding a female anglerfish to prevent death. The sensitive olfactory organs help the male to detect the pheromones that signal the proximity of a female anglerfish. When he 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. The male then becomes totally dependant on the female for its existence. Source: Wikipedia Image: Wikipedia

<img “480”=”” alt=”Humpback Anglerfish ” src=”http://www.heyiamonline.com/images/Humpback_anglerfish.png” width=”” />

<img “480”=”” alt=”Triplewart Seadevil Fish Sexual Dimorphism” src=”http://upload.wikimedia.org/wikipedia/commons/thumb/6/69/Cryptopsaras_couesii_%28triplewart_seadevil%29.png/800px-Cryptopsaras_couesii_%28triplewart_seadevil%29.png” width=”480″ />
Image Source: Wikipedia

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