Which of the following are life history traits of intertidal species that stick to rocks? I. Mobile larval phase II. Sessile adult phase III. Many offspring per adult IV. Sessile as larvae and adult Which of the following are life history traits of intertidal species that stick to rocks? I. Mobile larval phase. II. Sessile adult phase III. Many offspring per adult IV. Sessile as larvae and adult I and II All are correct I , II , III III and IV II.