Jellyfish drift in Yara's coastal waters in groups of two or three and sting you if you swim into them. The sting is minor on most difficulties, but jellyfish also hint that bull sharks are close.
Jellyfish don't chase you. They float in place, and you only get stung by swimming too close.
Swim around them rather than through them. When you spot a group, look around for bull sharks before you keep diving.
Barracuda
Barracuda are fish you catch at fishing spots around Yara's coast, and their meat is useful for trading and cooking. A Barracuda brochure shows you where several of those spots are.
Black Hawk
The black hawk is a bird of prey you can hunt in Yara for its meat. It poses no danger to you, and the meat trades for Durable Plastic, which makes it worth a quick shot when you see one.
Bull Shark
Bull sharks are the dangerous sharks in Yara's waters, and you can also catch them at marked fishing spots. Their meat is good trade stock, but swimming near one is a bad idea.
Cougar
Cougars are big cats that stalk Yara's mountains and attack you on sight. They are worth hunting, because cougar meat trades for Durable Seals and cooks into stealth-boosting Ninja Nachos.