GENERAL HISTOLOGY

Detailed explanation-1: -The most common algae grazers they found were a small sea urchin about the size of a ping pong ball, Echinometra viridis, and a tiny finger-sized striped parrotfish, Scarus iseri, which would be of no interest to fishermen.

Detailed explanation-2: -About the Sea Urchin About 18 of them are edible. They primarily feed on algae and kelp, but are also omnivorous scavengers that will feed on animal matter.

Detailed explanation-3: -Sea urchins graze actively on seaweed using sharp jaw parts (found in a structure called Aristotle’s lantern) to chew up kelp, a favorite food source. These animals are prized for their roe which reaches peak quality in fall and winter months.

Detailed explanation-4: -While herbivory by fishes and molluscs can influence macroalgal communities, sea urchins are by far the most destructive grazers of macroalgae and kelp forests (Steneck et al., 2002; Filbee-Dexter and Scheibling, 2014; Ling et al., 2015; Steneck, 2020).