Threefin blenny to rock crevices at any perceived threat. Threefin blennies are diurnal and territorial; many species exhibit sexual dichromatism, with the females drab compared to the males. The second dorsal fin is also extended in the males of some species. Small invertebrates comprise the bulk of the threefin blenny diet. FishBase lists about 150 species in 30 genera: Threefin blenny Threefin or triplefin blennies are blennioids, small perciform marine fish of the family Tripterygiidae. Found in tropical and temperate waters of the Atlantic, Pacific and Indian Oceans, the family contains about 150 species in 30 genera. The family name derives from
Human uses of living things Human uses of living things Human uses of living things, including animals plants, fungi, and microbes, take many forms, both practical, such as the production of food and clothing, and symbolic, as in art, mythology, and religion. The skills and practices involved are transmitted by human culture through social learning. Plants provide the greater part of the food for people and their domestic animals: much of human culture and civilisation came into being through agriculture. While a large number of plants have been used for food, a small number of staple crops including wheat, rice, and maize provide most of