Sharks on Istanbul’s Beaches? Here’s What’s Really Happening

Lately, people around Istanbul have been spotting sharks closer to shore than usual — especially in places like Caddebostan Beach. Not surprisingly, it’s been causing some panic. But before you imagine scenes from Jaws, let’s break down what’s actually going on.

First of all: no, this isn’t an “invasion” and no, you’re not in danger.

The reason these sharks are getting closer to shore is simple — they can’t breathe properly in deep water anymore. Due to pollution and climate change, oxygen levels in the deeper parts of the Marmara Sea have dropped significantly. In some areas, the oxygen is nearly gone. Since sharks need a lot of oxygen to survive (their metabolisms run fast), they’re being forced to move into shallower, more oxygen-rich waters — which just happen to be near the coast.

Here’s the good news: these aren’t aggressive sharks. The species showing up are mostly smaller types, often called smooth-hounds. They usually don’t grow larger than 2 meters, and they’re naturally scared of humans. The more dangerous types of sharks (like great whites) actually left the Marmara Sea about 40 years ago.

And if you’re wondering where these sharks even come from — most of them originate from the North Atlantic, with a few tropical species entering through the Suez Canal. Only a handful are native to the Mediterranean itself.

So yes, sharks are coming closer to the shore, but no, it’s not time to panic. They’re not hunting people — they’re just trying to find a place where they can breathe.

Bottom line: the ocean’s changing, and the sharks are reacting. Maybe it’s time we paid more attention to what’s happening under the surface.