It is very convenient to do scuba diving on Comino. From the dive center to the water only 2 minutes walk. Well but you have to carry all the equipment and it could be a bit heavy. But it is worth it.
You can do shore dives up to 6 meters, and there are more to see than you thought. I have seen a bearded fireworm, a sea cucumber or an eel (not quite sure what it was), and a pink octopus by night dive. With a boat you can drive to the other sides of the island to do some real dives, e.g. P31 wrack at 20 meters or St. Marija Cave at 5-9 meters. At the end of May, the water temperature on the surface is about 20 degree.
Sorry no unterwater pictures because I am still searching for a unterwater camera...