coral catshark on seafloor,

acidification animals beautiful biology catshark change climate colorful colors conservation coral deep diving ecology ecosystem elasmobranch environment evolution feeds fish habitat indonesia invertebrates island landscape lembeh life marine natural nature niche nocturnal ocean pacific rare reef reefs reefscape research scenery scenic science sea seafloor seascape shallow small snorkeling species strait sulawesi tourism travel tropical tropics underwater water wild wilderness wildlife