The Three-point Damselfly
The Damigella fish Dascyllus trimaculatus, also known as the Three-point Damselfly, is a tropical species that lives in the Indian and Pacific Oceans: from the Red Sea and East Africa to the Maldives and from southern Japan to the Great Barrier Reef of the Australia. The livery varies from dark gray to black with two white spots on the sides and a white spot between the eyes. The adults are very robust, do not exceed 11 cm in length and live in small groups together with even younger specimens among the branched corals of the coral reefs, from a few meters below the surface up to 50 meters deep. We often find them in symbiosis with the anemone Heteractis magnifica, also known as anemone magnifica, large solitary anthozoan coelenterate that can reach 1 m in diameter as we show you in this short video. pesci damigella dascyllus trimaculatus
Pomacentridae is a family of ray-finned fish, comprising the damsefishes and clownfishes. This family were formerly placed in the order Perdiformes They are noted for their hardy constitutions and territoriality. Many are brightly colored, so they are popular in aquaria. Around 385 species are classified in this family, in about 29 genera. The name of the family is derived from the Greek words; poma roughly translates to the English “cover”, referring to the fishes’ opercula, and kentron is Greek for sting. The name refers to the serrations found along the margins of the opercular bones in many members of this family. pesci damigella dascyllus trimaculatus
Pomacentrids are found primarily in tropical seas, with a few species occurring in subtropical waters. Most species are found on or near coral reefs in the Indo-West Pacific (from East Africa to Polynesia). The area from the Philippines to Australia hosts the greatest concentration of species. The remaining species are found in the Atlantic or eastern Pacific. Some species are native to freshwater or brackish estuarine environments. Most members of the family live in shallow water, from 2 to 15 m in depth, although some species are found below 100 m. Most species are specialists, living in specific parts of the reef, such as sandy lagoons, steep reef slopes, or areas exposed to strong wave action. In general, the coral is used as shelter, and many species can only survive in its presence.
The bottom-dwelling species are territorial, occupying and defending a portion of the reef, often centered on shelter. By keeping away other species of fish, some pomacentrids encourage the growth of thick mats of algae within their territories, leading to the common name farmerfish. They display a wide range of colors, predominantly bright shades of yellow, red, orange, and blue, although some are a relatively drab brown, black, or grey. The young are often a different, brighter color than adults. Pomacentrids are omnivorous or herbivorous. In captivity, pomacentrids live up to 18 years, but they probably do not live longer than 10 to 12 years in the wild.
(tratto da Wikipedia)