tropical fish include fish found in tropical environments around the world, including both freshwater and saltwater species. Fishkeepers often use the term tropical fish to refer only those requiring fresh water, with saltwater tropical fish referred to as marine fish.
Saltwater fish from coral reefs are famous for their bright coloration with some fish being fluorescent.
Types of Marine Fish
These big beauties are luridly coloured and very interesting to watch, but not for the faint hearted aquarist. They need large aquariums and should not be kept in groups. Two angels might be kept in the same aquarium provided it is a large aquarium, they are properly acclimated as juveniles, and they are have very different colouring and body shape. However, because all Angelfish have essentially the same diet, mixing them is a feat that should be left to only advanced keepers. None are reef safe, and a potential owner should be aware that they need to have plenty of vegetable matter in their diet. They undergo major changes in colouration while maturing, and unless specified given descriptions are for adult specimens.
Anthias fish are a grouping of small marine aquarium fish which are located in roughly all tropical oceans. They are typically some of the brightest colored marine fishes in the ocean and are especially admired additions to the saltwater tank. They come from the family Serranidae that have mostly basslets as well as groupers. In the basslet family, they are classified in a sub-family named Anthiinae.
There have been seven discovered types among this subfamily so far. Anthias are mainly a shoaling species that can occasionally be found in the thousands throughout their usual habitats on the reefs.
Some do exceptionally poorly in captivity and reject prepared foods until they finally starve to death. Multiple feedings of small foods need to be available every day. A few good selections are made up of cyclopeeze as well as grinded meaty seafoods. Feedings more than of three times each day is recommended. If such a feeding timetable cannot be offered, it would be best to shop outside of the anthias family of fish.
Anthias are located at depths anywhere from twenty feet all the way as deep as 200 feet. Deeper dwelling anthias regularly command a incredibly expensive price and are almost always sold immediately when available. Two recognizable and pricey deep dwelling varieties are Pseudoanthias Ventralis and Pseudoanthias Privitera.
They are customarily found living in areas of exceedingly high flow, something that ought to be replicated in the home aquarium. Roughly all anthias types feed on saltwater plankton during the day. This fact makes these stunning fish fairly tricky to house in the aquarium.
Taxonomically, "basslet" is really a poor name for these kind of fishes, but that’s the way they are often sold, so that’s how they will be described here. Taxonomy aside, basslets are generally related to the “true basses” (Family Serranidae) like the fishes from the Family Grammatidae, the so-called Grammas and Assessors, and the Dwarf Seabasses from the genus Serranus, which actually are from the Family Serranidae.
Found in most oceans of the world, butterfly fish are small, thin, disk-shaped fish with pointed noses. There are many varieties, the four-eyed butterfly probably being the most common from New England to the Caribbean. Many of these fish have a dark band running vertically through each eye. This is an aid for the fish being able to camouflage themselves on the coral reefs where they live. Most butterfly fish have pointed snouts, very useful for plucking out the small coral animals and getting into small crevices for tiny invertebrates which they feed on. . The four-eyed is pale yellow or whitish, with a dark eye band and a large dark spot on the tail. To a predator, the tail appears to be the fish's head and often allows the butterfly to escape being the "blue plate special" of the day.
Tangs, Surgeons and Unicornfishes
The family of of surgeonfishes, tangs, and unicornfishes is Acanthuridae ("thorn tail"). It includes about 80 species in six genera, all of which are marine fish living in tropical seas, usually around coral reefs. Many of the species are brightly colored and popular for aquaria.
The distinctive characteristic of the family is the spines, one or more on either side of the tail, which are dangerously sharp. Both the dorsal and anal fins are large, extending for most of the length of the body. The small mouths have a single row of teeth used for grazing on algae.
Surgeonfishes sometimes feed as solitary individuals, but they also often travel and feed in schools. It has been suggested that feeding in schools is a mechanism for overwhelming the highly aggressive defense responses of small territorial damselfishes that vigorously guard small patches of algae on coral reefs.
The Wrasses constitute one of the largest (the second largest family of fishes (after the Gobies with at least 60 genera and six hundred plus species.) and most diverse families of marine fishes. From amongst the smallest (Minilabrus striatus of the Red Sea at under two inches and part of an ounce) and largest (the Napoleon Wrasse, Cheilinus undulatus at more than seven feet and four hundred pounds) of species, they are plain to outright gaudy in their markings and coloration, easygoing to the point of total non-competitiveness to true terrors of the reef. (Labrid fishes are found in shallow waters, tropical to semi-temperate, worldwide with the exception of the Arctic and Antarctic seas).