Scuba dive around Mnemba atoll. $180USD with East Africa Diving for double dive
Take a 2 hour sunset cruise on a dhow down to Kendwa and back $15USD per person. Alternatively, hire the whole dhow and enjoy a private cruise, lingering where you wish $40USD. Clever negotiation may get you free snorkling equipment hire and a stop at Kendwa where you can leap over the side and snorkle on the reef.
Visit the Mnarani Aquarium/Sea Turtle Conservation area 7000TSH or $5USD per person
