Greater weever
This predatory fish lives on the east coast of the Atlantic Ocean and in 3 seas: the Mediterranean, the Aegean Sea, and the Black Sea. The weever lives in both shallow waters and in deep waters. It likes to dig into the sand, which sometimes results in people stepping on it. Unfortunately, these meetings often end up as traumas or can have even worse consequences.
The fish has poisonous spines on its fins and gill wings. A sting with this kind of spike can even lead to death. However, usually, there is not a big risk for humans — the sting will be really painful, but it should get no worse than that.