Walked through the hotel area.
Checked out the Bosphorus full of jellies. Apparently lower layers flow to Black Sea and upper to Marmara. Depth ranges from 34m to 120m, width from 750m to 3.7km. Sewage is treated then put to lower levels as Black Sea has more robust capacity.
Checked out the wildlife.
These guys are tagged and seem to hang around, looked like the park fed them too. They're 20 feet from a coffee shop terrace taking a break from sniffing people.
Got to the top of the hill for a view.