Nudibranch

Abundant and varied across the walls and muck; Cave Point and the muck sites are particularly good, and rare species such as the Djibouti giant nudibranch have been recorded.

Anilao is one of the richest nudibranch areas on earth, with hundreds of species documented; found year-round on nearly every macro dive.

The walls and slopes hold a wide variety of nudibranchs; Bunaken Timur and the Siladen reefs are good for macro-focused dives.

Nudibranchs are found on the coral-covered hulls, especially the Kogyo Maru, for divers who slow down and look. Year-round.

A huge variety of nudibranchs, including Costasiella (Shaun the Sheep), are found across the Dauin muck year-round; a mainstay of macro-focused dives here.

Common on the reef and muck sites around San Miguel Island and Ticao, which are noted for macro photography.

Reliable for macro fans across the reefs and on night dives at Meno Wall; a range of species present year-round.

Nudibranchs are common macro subjects across the reefs and on the wreck structure.

Common across the soft-coral pinnacles and macro sites year-round.

A steady macro subject across the reefs; many species present year-round, popular on training and photography dives.

Year-round, and the southern upwelling sites are where they concentrate — Cannibal Rock, Yellow Wall and the Nusa Kode bays are described by operators as holding unusual nudibranchs alongside fire urchins, sea apples and Coleman shrimp. Wainilu in the central park is the accessible muck alternative from a day boat. No seasonality documented.

Hundreds of nudibranch species are recorded in the strait; found on every dive year-round.

Diverse nudibranchs year-round across Gato and the macro sites.

A range of Mediterranean nudibranch species on reefs and wrecks; the artificial-reef wrecks at Xatt l-Ahmar are known for them. Resident year-round, a macro-photography staple.

Abundant macro subject on the walls and house reefs, especially Tongo Point and the Panagsama wall.

Diverse nudibranchs and flatworms year-round, best found on night dives. The Spanish dancer (Hexabranchus sanguineus) is among the notable Red Sea species.

A wide range of nudibranchs is present year-round across the reefs, a staple of the region's macro diving.

Dozens of nudibranch species are reliably found across Puerto Galera's macro and muck sites year-round; a core draw for critter hunters.

Resident year-round across most reef and rubble sites; one of the most consistently found macro subjects in the region.

Diverse nudibranchs year-round on the Mabul and Kapalai muck sites (not subject to the November closure).

Vava'u's macro is a genuine strength: nudibranchs are reliable on the cave walls and at Split Rock and Sea Fans, year-round.

A wide variety of nudibranchs are found across the reefs year-round, a staple for macro shooters here.