The site is "Shavei Zion, off the coast of western Galilee."
I am confused about whether this sanctuary was for Phoenician traders (i.e., from roughly the coast of Lebanon) or Punic traders (from Carthage and its satellites in North Africa) or both.
The site is near the Phoenician coast, but as far as I know, Tanit was a Punic goddess. There is very little evidence that she was worshipped on the mainland.
Cross-file under Phoenician Watch and Punic Watch and Not a Shipwreck. Past PaleoJudaica posts on marine (maritime, underwater) archaeology are here and links.
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