Bluespotted cornetfish

It is widespread in the tropical and subtropical waters of the Indo-Pacific as far north as Japan and east to the west coasts of the Americas, and Mexico's Sea of Cortez and the Red Sea. and as far north as the Gulf of Lions by 2007. At this point, it has been recorded in all Mediterranean sub-basins and is now very common in the eastern part. F. commersonii is now considered an invasive species in the Mediterranean Sea because of its rapid development to reproductive stage and its detrimental effect on native fish populations. This is known as the Lessepsian migration which is an event that occurs when fish, usually fish from the Red Sea "migrate" to the Mediterranean Sea from the Suez Canal. The fish in the Mediterranean are all descended from a small number of ancestors, possibly as a result of a single invasion event, and are not as genetically variable as their conspecifics in the Red Sea. ==Morphology==

The bluespotted cornetfish grows to a length of , but the average is around . It has a tubular snout, large eyes, and a long tail filament lined with sensory pores that may help with detecting prey. Its body is tinted blue- to greenish-grey ==Biology==

The bluespotted cornetfish is usually a solitary predator, stalking and feeding on small fishes, crustaceans, and squid. They can also hover or swim in small schools just below the surface. Parasites that live in bluespotted cornetfish continue to thrive in their hosts even as they colonise non-native locations. This contradicts the prevailing theory, called enemy release hypothesis, that parasites would not be able to survive in hosts as they encounter new marine territory. The presence of introduced parasites affects not only Fistularia commersonii, but also other fish and marine animals in their native habitats. ==Human relevance==

The fish is of minor importance commercially, mostly being sold as fish meal, but also fresh and preserved. It is also sold as an aquarium fish. ==Name==

The specific name honours French botanist Philibert Commerson (1727-1773). ==References==