👉 Petricola is a type of fish that belongs to the order Chondrichthyes, which includes fish and sea creatures like sharks, rays, and octopuses. They are known for their distinctive coloration, which can range from white to black or brownish gray scales with patches of green or blue in some species. Petricolas have a long, thin body that is covered in a hard outer shell, and they have a streamlined body shape that helps them swim quickly through the water