With diving comes responsibility. One of the first things that hits you when you become a diver is the sheer amount of trash that litters our ocean floor. Pretty much everything that is thrown onto the street near the coast ends up in the ocean, so your first obligation as a diver is to always dispose of things properly and to pick up any plastic or trash that you may see lying around.
As a diver, you should always respect the environment you are in and that means trying to not scrap your fins over ocean floor or coral beds as this can cause damage.
Equally, make sure that all your equipment is secure and try not to let anything snag on the rocks or coral, as it may break it.
Never remove anything from dive sites, whether it is a souvenir from a wreck, a shell, a fish… whatever. Just don’t do it. Also, do not disturb any wildlife. While it is absolutely fine to watch, take it all in and even feed marine life, you should never disturb anything because you might harm it, or its habitat. It is also worth noting that fish or sharks can bite and there are several species of venomous and poisonous fish, or urchins out there.
Never, ever go spear fishing with a scuba tank. It is illegal in most countries and it is also totally wrong. Over fishing is a huge problem in the world and trying to catch big game fish with a scuba tank is morally wrong. The same goes for foraging. The ocean’s stocks are running lower and it is totally against the divers’ code to do anything of the sort. Last but not least, if you see any of these violations, try and reason with the person committing them, but if they persist, report them to the police or rangers in the area.