Juergen Freund / Healthy coral reef in the shallows, West New Britain, Papua New Guinea.

Juergen Freund / Shoal of schooling Coral razor / Shrimp fish (Aeoliscus strigatus) with diver on hard coral reef, North Sulawesi, Indonesia.

Juergen Freund / Brown tube sponge (Agelas tubulata) in the reef, North Sulawesi, Indonesia.

Juergen Freund / Giant barrel sponge (Xestospongia testudinaria) studded with crinoids / featherstars with diver in the background, Kimbe Bay, West New Britain, Papua New Guinea.

Juergen Freund / Juvenile schooling fish on coral reef, Indo-pacific

Juergen Freund / Banded sea krait (Laticauda colubrina) swimming above coral reef, Pacific

Juergen Freund / Featherstar in fan coral {Crinoidea} Indo-Pacific

Juergen Freund / Split-level image of corals and island, Philippines

Juergen Freund / Lionfish on coral reef, Indo-Pacific

Juergen Freund / Nudibranch / sea slug (Glossodoris hikuerensis) on coral reef, Papua New Guinea.

Juergen Freund / Friant's sea star (Nardoa frianti) on reef with crinoids / featherstars, West New Britain, Papua New Guinea.

Juergen Freund / Healthy reef with plate corals and steep drop-offs, West New Britain, Papua New Guinea.