Bluehead wrasses can transform from female to fertile male in as little as 10 days. By Jason Goodyer. Around species are fish are known to undergo one of the most startling transformations in the natural world — the complete reversal of sex. Now, a study carried out at the University of Otago on bluehead wrasses, a small-bodied fish that lives in coral reefs in the Caribbean, has found out how they do it.
Humans owe joy of sex to ancient fossilised Scottish fish: Australian scientists
Genetic secrets of sex-changing fish discovered - BBC Science Focus Magazine
Sexual dimorphism is the condition where the two sexes of the same species exhibit different characteristics beyond the differences in their sexual organs. The condition occurs in many animals and some plants. Differences may include secondary sex characteristics , size, weight, color, markings, and may also include behavioral and cognitive differences. These differences may be subtle or exaggerated, and may be subjected to sexual selection. The opposite of dimorphism is monomorphism. Common and easily identified types of dimorphism consist of ornamentation and coloration, though not always apparent.
Your guide to sex in the wild
Vertebrates have come a long way. Do It For Denmark! LONDON Reuters - Scientists studying fossils have discovered that the intimate act of sexual intercourse used by humans was pioneered by ancient armored fishes, called placoderms, about million years ago in Scotland.
It's also probably one of the only Oscar-nominated films to include a sex scene between a human being and a sea creature. The underwater sex scene inspired a slew of memes about the mechanics of an interspecies romance with marine life. Someone even made a Shape of Water dildo , so fans can have their very own model of the fish-man's junk.