Considered Kauaʻi’s best dive outfit, Fathom Five offers a full range of options, from Niʻihau boat dives to certification courses and enticing night dives. Newbies can expect reassuring hand-holding during introductory shore dives. Groups max out at six people, and mixing skill levels is avoided. Scuba and snorkel gear are rented at the full-service shop. Book well in advance.