Last summer, we had the use of a boat for a few weeks and tended to go north from Arillas towards San steff, as we passed the end of the rocky outcrop between the two towns, we did often see two types of jelly fish. Most were clear and quite hard to spot but we also noticed some with a redish/brown tint on the back. The good news is that every time we returned to Arillas. the closer we got, the fewer we saw, it must be the temp of the water which is very deap near the end of the rocky outcrop. hope this help, regards, Gary.