Channels of the Hawaiian Islands Maui. Although the channel is only about at its shortest point, it is one of the windiest and roughest in the Hawaiian Islands. The Kalohi Channel is the stretch of water separating Lānaʻi and Molokaʻi. Depth of water in this channel is about and width is . This is one of the less treacherous channels between islands in the archipelago, although strong winds and choppy sea conditions are frequent. Kalolohia beach on the Lānaʻi coast is also known as "Shipwreck Beach" because of a wreck on the reef there. Kalohi means "the slowness." The Kaiwi Channel (also known as the
Northwestern Hawaiian Islands introduced to Laysan and Lisianksi, where they multiplied and devoured most of the vegetation, permanently extinguishing several species. However, most of the damage was reversed, and the islands were restored largely to their pre-exploitation state. Some of the endemic species of the NWHI include the Nihoa and Laysan finch, the Laysan duck (the "rarest native waterfowl in the United States"), and the Nihoa fan palm. Other notable species are the Laysan albatross, the highly endangered Hawaiian monk seal, and the green sea turtle. The only native trapdoor spiders in the Hawaiian archipelago ("Nihoa" spp.), recently discovered, are found only here.