Grouper of Mediterranean Sea
This video shows a typical reef of Mediterranean reef particularly exploited by sport fishermen. As you can see there are many nylon fishing lines that have remained entangled in the rocks like this however create pollution from plastic materials. The Grouper of Mediterranean Sea is inside his den but, unfortunately the fish has two fishing hooks stuck in his upper lip, frightened by the presence of the diver and his video equipment, he immediately gives himself up to escape leaving us with a palm of the nose… It is in any case a meeting that we have gladly done and reassures us on the vitality of our Mediterranean Sea. cernia mediterranea
Recall that the Epinephelus marginatus is a fish belonging to the family Serranidae, hermaphrodite proterogino who lives long, some estimate over 50 years, and become male around 12 years. Therefore all specimens of great size are male. The presence of this fish highlights a good state of health of the sea and for us scuba divers is always good news. Many serranid species are brightly colored, and many of the larger species are caught commercially for food. They are usually found over reefs, in tropical to subtropical waters along the coasts. cernia mediterranea
Serranids are generally robust in form, with large mouths and small spines on the gill coverings. They typically have several rows of sharp teeth, usually with a pair of particularly large,canine-like teeth projecting from the lower jaw. All serranids are carnivorous. Although some species, especially in the Anthiadinae subfamily, only feed on zooplankton, the majority feed on fish and crustaceans. They are typically ambush predators, hiding in cover on the reef and darting out to grab passing prey. Their bright colours are most likely a form of disruptive camouflage, similar to the stripes of a tiger.
Many species are protogynous hermaphrodites, meaning they start out as females and change sex to male later in life. They produce large quantities of eggs and their larvae are planktonic, generally at the mercy of ocean currents until they are ready to settle into adult populations. Typically groupers live in their lair, where they feel safe, and go out to get food and check the territory.
(extract from Wikipedia)