Murex and Rock Snails: Family Muricidae
Murex and Rock snails are predatory sea snails that mainly feed on bi-valves by rasping a hole in clam and oyster shells. Below is the Giant Eastern Murex:

Giant Eastern Murex rare on S. Hutchinson Island beaches (February 2021)
S. Hutchinson Island has a good number of both the predatory murex and rock snails.