Question on Barbados, Barbados

diving east coast in march

Hi there, vising Barbados staying on east coast from 7-15th March this year. I have around 80 dives to my name and been very lucky to have dived all over world. I like the big stuff and it seems my only chance of seeing sharks is on east coast but is it possible/worth diving there in March? If not, which dive sites would you recommend elsehwere for rays and turtles at this time of year. I am not overly fussed about wreck diving but could be persuaded. In addiont, my partner - who is not a fan of diving would love to see turtles while snorkelling - is this possible? Thanks community!