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Has your husband snorkelled in Pereybere? You take a small boat, negotiate the price to take you to the reef and wait, it is spectacular.
Try Tamarin as well, more towards La Preneuse, where Food Lovers is. The only challenge is access, every 100 meters between the beach villas one should have a passage access. There is one at the Bay Hotel, nice place to spend the day and move on foot towards the north.
Once you come to a peer, another 300 meters, and snorkel out to the reef passage. Worth it. Another spot, is the Cathedral in Flic En Flac just opposite Villa Caroline, nice beach to relax. I've posted a few photos here.

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Ooh I will have a look. Thanks for the suggestions :)

Like @mauritiusphotos pointed out, Blue Bay is the best choice of all apparently, never done it, 5 degrees colder than West coast.

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Blue Bay is the best, don't think?

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