Collected off the beach near Puerto Penasco, Mexico. They tend to only colonize certain parts of certain beaches. I'm assuming this is due to current and nutrients. Collected at low tides. Tides range 7 meters or 24 feet at Puerto Penasco.
$12.00 FOR RANDOM LOT OF 6 SPECIMENS
30mm - 40mm / 1 1/8" - 1 5/8"