Found with Chthamalus in the mid-intertidal, and preyed upon by the whelk Nucella ostrina.
Lermaea - fish Skin parasite on Bagrus meridionalis
Large. Nearly an inch in diameter.
On right of photo with mussels
Copepods of some sort, in flooded woods near a cattail marsh. About a half centimeter or so long.
Baja California, Mexico
Taken through microscope, sample from Pacific Ocean