Kerehikapa Island and surrounding Islands are part of the Arnavon Community Marine Conservation Area (ACMCA). They are located in the Solomon Isands.
The protected area encompass 40,000 acres, including 3 small uninhabited islands, and surrounding coral reefs. The U.S.A based nature Conservancy helped three communities (Katupika, Kia and Wagina) came together in 1995 to protect the Arnavon Islands.
As a visitor, there are a few interesting things to see. First, it is a protected reserve with no one here but the rangers; there are no villages, no fisherman; this is a rarity in Melanesia. One of the islands has a population of nesting Melanesian scrubfowl. There is good for birding along the beach, with species such as fantails, parrots...
Access for an independent traveller is difficult, I would imagine! Coral Princess Cruises goes there about once a year, on their Melanesia trip. (However, it is wise to check their itinerary before booking, as it does change.)