In the Adriatic you don't have to afraid of sharks!
Shark attacks are rare in Croatia, whose sea is a natural home only to smaller sharks that do not harm humans. But larger sharks sometimes stray into the Adriatic after following big overseas ships that sail from the Med to Adriatic ports eating garbage that ships let out into the sea. It is a rare thing those sharks come close to the coast and when it happens it is a top story for all TV news crews.
In the last hundred years six attacks were in the northern Adriatic, four of which ended in death, according to a list of a local newspaper.
Sea Urchins live on the seabed of the Adriatic coastline in great abundance. Be sure to watch your step when the tide is very low. In many places, especially isolated beaches, you will find them, which is a good reason to have some sort of foot wear. But be glad when you see sea-urchins, it means the water is absolutely clean because they live only in especially clean waters.
Wear old sneakers or plastic swim shoes, when you get there. Maybe it does not look the best, but it will help, to avoid pain if you step on them.
Another danger may be caused by the jellyfish, which may be found on the Dalmatian coasts in big swarms. Once you've been stung, little red welts will arise and they will itch three or four hours later. There are some "jellyfish sting" suntan lotions but bottom line is, they do not work. The best way to treat a jellyfish pinch is to put vinegar on there. If you don't have vinegar, urine will work in a pinch … But I haven't tried it.
By the way, locally the sea urchins are considered a great delicacy and they are eaten while alive. You either just lick the insides out or, if you are feeling slightly more refined, you scoop them out with a small piece of bread.
I have never been brave enough to eat sea urchin.
Invest in a pair of “plastic” shoes the moment you arrive. Best investment I made as the sea urchins are hidden between rocks in the sea and sometimes very difficult to spot. I was told that if you do step on one then it will sting tremendously, but you must keep your foot in the seawater for a few minutes. I helps they say.