Hi Divenski..
What can I say about diving the Grenadines? I've been here a fair few times and now have over 250 dives up and down the chain. I have also bought into a dive centre in Carriacou as I love it so much (so please excuse the bias).
St Vincent - Not famed for its diving. There is some coral in the south-west corner, but it is totally over-fished and somewhat dissapointing. If you're looking for diving with the large island appeal try Dominica (good reef and diverse marine life) or Grenada (so so reef, but great wrecks).
The Grenadines is a completely different proposition though!
Bequia - A very pretty island, but the diving close by is so-so. The dive centres will try to bring you down to the Tobago Cays marine park or petite tabac as the reef there is in much better condition. There is some good diving around Sail Rock, but its right out in the middle of the Atlantic and can be a tough dive. It is also very expensive (IMHO)
Union/Petite St Vincent/Petite Dominica - I've added these one's in as they are the resort islands that surround the Tobago Cays Marine Park. Very popular with snorkellers and divers alike. Its famous in the area and Cousteau made Horseshoe Reef famous, and Pirates of the Caribbean shot many scenes in Petite Tabac. I like the reefs there, and with the turtle sanctuary in the middle, you're likely to see some swimming around as they feel safe. My main observation when diving with the Marine Park manager was 'where are the fish?' as there is an overall low fish-biomass in the area with local fishermen supporting the tourism industries in Barbados and St Vincent with a lot of fish despite the 'no take' rules in the park.
Carriacou - My home now, but I made the decision the base myself here because of the diving. Its a quiet island that is not too fussed about tourism. Most of the locals are not employed in the tourism sector and don't see tourists a cash cows - as a result they don't hassle you the same way as you can get hassled on other islands. Many (including me) find this refreshing and really quite nice. Tourism isn't big, so there are not too many divers coming here - great if you love diving, but not so great when you've just invested in the dive centre! However, the Marine Park Manager was at pains to point out that the fish diversity and biomass in the Carriacou Marine Park is much higher than that in Tobago Cays (or anywhere in the St Vincent Grenadines) and this is all down to the respect of the park from the majority of fishermen. In Carriacou we have some pristine reefs, with forests of black coral growing. We see an abundance of juvenile schooling fish, lobsters and our fair share of sharks (particularly Nurse). It still blows me away when we drop into some of the sites. We have about 30 different sites all within about 15 minutes of the dive centre, which cater to all levels and desires. From May I will be adding about another 20 as we will have a new 30' dive catamaran coming on stream. I got a new camera 2 months ago and have created a video of what we can see around the island and put it on Youtube (
Underwater Carriacou with Deefer Diving - YouTube), check it out if you like and see for yourself.
I am always interested in other people's opinions of diving in the region, what was good, what was bad and how did it work for you - helps me to work out what we should do to improve customer service and entice people to come back.
Let me know if you've got any other questions or want to know a bit more about the region.
Kind regards
Gary.