sea no relation strait
An isthmus (; PL isthmuses or isthmi; from Ancient Greek  ἰσθμός (isthmós) 'neck') is a narrow piece of land connecting two larger areas across an expanse of water by which they are otherwise separated. A tombolo is an isthmus that consists of a spit or bar, and a strait is the sea counterpart of an isthmus, being a narrow stretch of sea between two landmasses that connects two larger bodies of water.
no relation