What is the best dive centre.
Any good dive sites? Reefs? Wrecks? Walls? Any decent wildlife?

Dont'really know much about the diving in the CVO area but I know they have a diving school, up to instructor development level at the Hotel Tivoli Almansor just ouside the town. Here's the link
http://www.tivoli-diving.com/index_e.htm

Just a wonderful setting for diving, worth contacting them.
Gaynor

my son and his friends go scuba diving along the coast. there's a wreck off Praia da Marinha but I'm not sure how old it is, as for walls I've no idea what they are! he says it's really clean down there no rubbish, but I'll take his word for it. He had his first big catch the other day 8 cuttlefish some nearly 1kg!! Altogether they caught 21 cuttlefish, 2 octopus and 4 crabs, not bad for a 10 euro license!!

There's a nice little Dive school at Quinta do Paraiso just past the restaurant.