Just back from 8 days in Greece, Crete, Chania. Tavropnitis, Afrata, Kissamos and Kolumbari. It is on the west side of Crete.I did a little bit of spearfishing there. Water was comfortable for skin diving, but it gets colder at depth. It should get colder in November, so my recommendation would be to use at least 3/2 mm wetsuit and weights. I had 75cm sling gun, and it was a very good setup for bigger fish, of which I got only one. The rest of my catch was smaller fish like wrasse, comber etc. I have seen some local spearo, obviously experienced fella, fishing at shallow depths like 10 ft, with small sling gun, perhaps 40 cm or smaller. He might have been after octopus as well. We were fishing side by side for some time. Beautiful waters to just freedive and enjoy. I have seen some murrays, rock fish and sea turtle. Good luck.