I saw groups of these egg sacks nestled amongst the sea snails in patches, I am almost certain that these are the eggs of the sea snail.
A lone orange nucella lamellosa on a rock in the intertidal zone.
Groups of these sea snails covered the larger rocks in the intertidal area. They seemed to prefer the eastern side of the rocks where they where found in greater numbers.
Muricidae, common names murex snails or rock snails, is a large and varied taxonomic family of small to large predatory sea snails. At least 1,000 species of muricids are known, and there are numerous subfamilies.