Chapter 14: Ecology of Psammechinus miliaris.

Chapter 14 of the book "Edible Sea Urchins: Biology & Ecology," Second Edition, edited by John M. Lawrence, is presented. It explores the ecology of the sea urchin genus Paracentrotus lividus. It discusses the ecological role of the sea urchin genus Psammechinus miliaris and presents the examination of the fatty acid profile of the gonad tissue which found that a diet rich in encrusting invertebrates leads to high gonad indices in the species.