Possible connection between Albanian "det" and Ancient Greek "thalas

Hello everyone, I noticed a possible relation between the 2 words leading to a common primitive source.
The accepted etymology for Albanian "det" is:
Shortening of dialectal dēt (South Gheg), from archaic dejt (Arbëreshë), from Proto-Albanian *deubeta, from pre-Albanian *dʰéubetos, enlargement of Proto-Indo-European *dʰeubos ‘deep’. This requires a pre-Albanian source and a semantic shift from 'sea' to 'deep'.
There is no consensus for Ancient Greek "thalassa".
Comparing those 2 words we can see that the initial d/th is common (derë/thura, dal/thallo etc). In albanian -l- becomes -j- before a consonant at the end of the word. So det <- dejt <- *delt <- *delet. At the same time Ancient Greek -ss- tends to derive from -tt- so thalassa <- *thalatta (tessares <- *tettares).
At this point we have 2 similar roots: *delet and *thalatta. One can speculate that this may have the same origin as several other mediterranean words found only in albanian and ancient greek (such as "shega" 'pomegranate' or "hudher" 'garlic'). What is your opinion on this reconstruction?

PS: the main problem is the first vowel.