It is very aggressive towards fishes from its species, except during the breeding season: In the spring, at nightfall, a pair forms and performs a complex courtship. It is a synchronous hermaphrodite: male and female at the same time. Very curious, it often approach divers.

The eye of this fish is masked by a black band that disrupts the visual perception of it body by predators. It has venomous spines on the dorsal and pectoral fins. It is easy to maintain in captivity but they need hiding places for shelter.

It is a nocturnal hunter. It lives in the bottom of the rivers, where it remains upright to hide among the reeds. It fits well in a large aquarium. But we must avoid leaving it with small fish that it could eat.

The Mediterranean parrotfish is a rare representative of the Scaridae in temperate zones. It is native to the warm waters of the south and east Mediterranean. It feeds mainly on algae and inhabits rocky areas up to a depth of 30 meters.

During breeding, the bream groups enter lagoons and estuaries to mate. Sought after since the Antiquity for the quality of its meat: the Romans fattened bream in tanks. Its intensive pisciculture has developed since the 80s.

By day, these fish form a small group and remain free from branched corals. At night, the group dislocates and specimens go down near the bottom for food. During the incubation period, the eggs are kept in the mouth of the male. The latter fasts until they hatch.

The African penguin, native to the coastal areas of South Africa and Namibia, is recognizable by its black and white plumage. This penguin primarily feeds on fish and squid. Like its relatives, the African penguin breathes air outside of the water and is capable of long dives underwater. Its aquatic outings frequently reach depths of 15 meters, but some individuals have been observed at over 70 meters. During the breeding season, males sing to attract females. Females also vocalize to strengthen the couple's bond.

During the day it feeds on plankton near the surface. It descends to the bottom before dark to capture small invertebrates. The male is more colorful than the female. It is a protogynous hermaphrodite species: females become males. Its flesh is not appreciated.

The black seabream is a prized species in western fisheries. It lives alone or in large groups near seagrass beds and rocky bottoms, seeking small invertebrates such as crustaceans or mollusks.

It differs from other species of wrasses because of the elongated shape of it head. Those who live in the Posidonia meadows (underwater flowering plants) are entirely green. The male builds a nest of seaweed and gravel where it distributes the eggs until they hatch.

During breeding season, its color becomes brighter and it builds a large nest with plant debris. It attracts the attention of females by performing a characteristic swimming. It will mate with several of them and it will protect and ventilate the eggs until they hatch.

The skin of this species secretes a toxic mucus for predators and parasites. This fish is territorial and fights involving males are common. To lay eggs, both partners embrace and rise to the surface to release their reproductive cells that will be mixed by sea currents.

The skin of this species secretes a toxic mucus for predators and parasites. This fish is territorial and fights involving males are common. To lay eggs, both partners embrace and rise to the surface to release their reproductive cells that will be mixed by sea currents.

Its shape and color helps it hide perfectly among the underwater plants. There are similarities in the way it reproduces compared to seahorses. The male has no pocket, but it carries egg rows glued to a ventral furrow.

It is one of the most colorful Mediterranean fish. The female has a black spot on the dorsal fin. The stain will disappear and its color becomes more vivid when it will change sex (hermaphroditism protogynous). It is more abundant in the northern Mediterranean.

The Indian sail-fin surgeonfish is a tropical fish native to the reefs of the Indo-Pacific. This fish has very large dorsal and anal fins, which it can use to double its size. It uses these features to impress its counterparts during courtship.

The twotone tang, like its counterparts, possesses scalpels at the base of the caudal fin. In times of danger, it can extend two small blades for protection against predators. Adults of these fish typically live in groups of around twenty individuals. They gather in large schools to spawn during the breeding season. They are exclusively herbivorous and graze on algae in coral-rich areas.

These surgeonfish are exclusively herbivorous, feeding on leafy algae near the reefs. The juveniles live alone among rocks or corals at shallow depths.