The unique

The male swordfish uses the fisherman's strategy correctly to "hook" the mates: it uses the "side tail" to give off the aroma like a bait to attract females.

Male fish will have a "tail" part that emits an attractive food smell to lure females.

Biologists say that the main food of the swordfish is ant, beetle, tailed bug (springtail) and flies, if these insects accidentally fall into the water. However, the main swordfish fish that eat ants will have a very similar tail, even emanating the smell of ants.'This is the use of natural sex appeal to maintain the race , ' said Dr. Niclas Kolm of Uppsala University in Sweden.

The tail fish that live in Trinidad waters are even more special because their 'attracting partners' tail has many different shapes. Experts suspect that the cause of this difference is related to fish food. For example, ants who like ants will like to bite into the tail of males, provided that males are also ants.

This finding reinforces the hypothesis that the 'sensory regeneration' feature has contributed to the evolution of organisms, which are now divided into different species.

Besides, 'sensory regeneration' also erases the line between food and palate choosing a partner. From the angle of the swordfish, the most suitable male is that you look like his dinner, Dr. Kolm said.