The nocturnal animal also feeds on dead animals. Its bite is not venomous, but very painful. It body, completely smooth (scales, flippers ...) allows it to slide easily backwards into a hole. It is one of the ingredients of the "bouillabaisse".

The name 'unicornfish' refers to the protrusions found in adult individuals. These unicornfish inhabit the tropical waters of the Indian and Pacific Oceans. Throughout their growth, these fish continuously change colors and patterns. They usually live in small groups, but large schools can form in areas with strong ocean currents.

Young orangespine unicornfish live near rocky reefs, in the company of other surgeonfish. As adults, these fish find their food, leafy brown algae, in coral or rocky areas. They usually live in small groups.

Naso vlamingii, more commonly known as the bignose unicornfish, is a surgeonfish found in much of the Indo-Pacific. It has a bump above its mouth from which a blue stripe runs to the base of its eyes. It has the ability to make this stripe appear or disappear.

Easily recognizable by its shape and blue color, this triggerfish naturally lives in groups in the turbulent waters near coral reefs. During the breeding season, males and females pair up to build a nest. They fiercely defend this small territory against other fish species and, more broadly, against any intrusion, even human.

The rainbow trout comes from the western United States where she was raised intensively since the beginning of the twentieth century. It was introduced in many parts of the world. In Europe, it sometimes supplants the native trout. In Wallonia, its introduction is prohibited in the natural environment.

It can breathe oxygen from the air, it stays at least half an hour under the surface between two breathes. Its tapered pectoral fins have a tactile and sensory role. Because of its large size, it is not recommended for the aquarium of a specimen.

The yellow boxfish is recognizable by its characteristic trapezoidal shape and its round mouth protruding like a beak. Its two large round eyes are prominent on the top of its head. Adults typically display a bright yellow color, covered with scattered black spots. However, there are variations in color such as ochre and blue, sometimes with white spots or black-ringed white spots, especially in the Red Sea. Juveniles are blue to greenish, always with the same pattern.

This fish lives camouflaged among the gorgonians. it watches its prey from a promontory and swims quickly toward them to catch them before returning to it observation post. During the breeding season, the male performs a courtship display to attract the attention of a female.

Like all crustaceans, it is forced to mutate to grow. Unlike lobster, it has no large claws, but its shell is covered with thorns. It uses its long antennae as "whips" to protect themselves from predators. Those are captured using traps or nets.

The palette surgeonfish sports a pair of venomous, erectable scalpel spines at the base of its tail, used for self-defense against predators. It primarily dwells in small groups within coastal reefs. Its electric blue color inspired the character of Dory in "Finding Nemo" and "Finding Dory".

It is one of the most known species to aquarists. It breeds easily in captivity, but it is too often taken from the wild. For several years, it has started to being raised in it home region. It became a source of income for local people.

During breeding season, the males are very aggressive towards one another and it is also the case with females. The pair looks for a territory where there is a crevice to deposit their eggs. They will protect juveniles even after hatching. It accommodates well to life in the Aquarium.

Its attractive coloring is mainly due to the refraction of light on the scales. They breed easily in aquariums.

The juveniles of this species have very long fins. They often let themselves drift with the currents in all positions, so they look like dead leaves. Adults sometimes gather in huge schools.

The male is much smaller and more colorful than the female. It is an ovoviviparous species, the male fertilizes it partner through its anal fin which forms a kind of gutter. It is the most popular aquarium fish, there are many varieties.

The female is larger than the male. Fertilization is internal and it is an ovoviviparous species. After a "gestation" of 28 days, the female "gives birth" to a variable number of juveniles: between 20 and 150. There are many varieties of color, the most common is black.

The Emperor Angelfish is found from the Red Sea to the Great Barrier Reef. Juveniles hide under reef overhangs or in holes in outer lagoons, while adults prefer caves in coral-rich areas. These fish feed on sponges and form pairs for reproduction.

Pseudobalistes flavimarginatus, better known as the "yellowmargin triggerfish" due to the coloration of its body, is a fish belonging to the balistidae family. It is found in tropical waters of the Indo-Pacific. It can be encountered on reefs and estuaries, but can also be observed on slopes and in lagoons.

This fish lives near diadem-urchins. At the slightest danger, it takes refuge between the long spines of sea urchins. The male guards the eggs in the mouth until they hatch. It is threatened in the wild because of fishing for the aquarium trade. This species breeds in captivity.