Among the shells discovered in the 8th century BCE destruction level is this Murex shell. This kind of shells was used in the production of purple dye. The Phoenicians were masters of this process and held the monopoly, but for making dye commercially hundreds and thousands of shells were needed. However, Tell Halif yielded only this one specimen suggesting that it was not used in the dyeing process.
So, what was it doing here?
Maybe one of the Halifites paid a visit to the beach and as a souvenir brought it back. Maybe.