There were at least 15-20 sea hares observed at this beach today. Many of the individuals were small, only 3-4" in length and almost all had a greener look than I usually see on this species. More pictures were not taken since lighting and tides made it difficult.
A juvenile perhaps? Only about 2" long
Wrigley institute of environmental science.
Found on shore, pushed back into water and it excreted purple ink.