Simply doing snorkling for a few years we can realize that slowly the Dusky Grouper – Epinephelus marginatus – is repopulating the subfund of our seas. For several years, about thirty, it was virtually disappeared and therefore at risk of extinction. The indiscriminate fishing of unscrupulous submarines has caused an endemic species to be virtually disappeared along the Italian coast, and at risk of drought or deeper depths. I remember that even where it is allowed to fish in apnea, however, there are some minimum measures to be observed for capture; and that underwater fishing with cans has been banned for decades. Cernia Bruna – Epinephelus marginatus – IntotheBlue.it
As can be seen from the video, the younger specimens are allowed to approach fearlessly from the sub, and it is a hermaphroditic proterogen, which becomes male around the age of twelve. Hence large specimens are all male, while the smallest and most at risk of capture are all female. This is the main reason why catching small specimens endangers the existence of the whole species. The hernia is also a territorial species, often in summer choosing a den and staying there all year long, we will continue to film and monitor the specimen of the video, obviously trying to disturb it as little as possible by making sure it does not get used to it too much in the presence of humans.
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. 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. Cernia Bruna – Epinephelus marginatus – IntotheBlue.it