Indo-Pacific
The heart of marine biodiversity — the Coral Triangle, Great Barrier Reef, and surrounding seas hold more reef species than anywhere else on Earth.
1,073 species
Sub-regions
Small Knob Coral
CoralPlesiastrea versipora
A shade-loving reef coral that thrives where brighter species fear to go.
Smooth cauliflower coral
CoralStylophora pistillata
A chunky, branching SPS coral that thrives where the waves hit hardest.
Snake Polyp
CoralIsaurus cliftoni
A reef-safe Pacific zoanthid that's forgiving enough for beginners to keep.
Snake Polyp
CoralIsaurus tuberculatus
Unusual colonial zoanthid with a distinctly tubular, snake-like body form.
Snowflake Blenny
FishSalarias ramosus
A personable reef grazer with bold patterning and surprising air-breathing ability.
Snowflake Coral
CoralCarijoa riisei
A soft, branching coral that frosts live rock with white, feathery polyps.
Snowflake Eel
FishEchidna nebulosa
A crustacean-crushing moray that coexists peacefully with fish tankmates.
Social Fairy Wrasse
FishCirrhilabrus rubriventralis
A jewel-toned Red Sea wrasse that dances through the water column in groups.
Soft Coral
CoralAlcyonium pacificum
A soft coral from Japanese waters that suits newer reef keepers well.
Sohal Tang
FishAcanthurus sohal
A bold Red Sea beauty that rules its territory with zero tolerance for rivals.
Solid Coral
CoralPorites solida
A boulder-sized reef builder with a smooth, sculpted profile and understated elegance.
Solitary Cup Coral
CoralCynarina lacrymalis
A puffy, jewel-like solo coral that thrives in calm, dimly lit reef spots.
Spine Coral
CoralHydnophora bonsai
A compact, ridge-studded coral with an unusual bonsai-like branching form.
Spine Coral
CoralHydnophora exesa
A shape-shifting Indo-Pacific coral with tentacles out around the clock.
Spine Coral
CoralHydnophora grandis
A bold, architecturally distinctive coral with a reputation for territorial aggression.
Spine Coral
CoralHydnophora microconos
A tough, lumpy coral that earns its place on any intermediate reef.
Spine Coral
CoralHydnophora pilosa
A branching reef coral with tentacles out around the clock.
Spine Coral
CoralHydnophora rigida
Branching coral with distinctive ridged spines along every branch.
Spiny Plate Coral
CoralEchinopora lamellosa
Tiered, whorl-shaped plates that can dominate entire shallow reef flats.
Spotted Goby
FishStigmatogobius sadanundio
A pale, spotted bottom-dweller from Asian estuaries with a surprisingly bold personality.
Spotted Hawkfish
FishCirrhitichthys oxycephalus
A bold little percher that claims coral real estate and rarely budges.
Spotted Mandarin
FishSynchiropus picturatus
A reef gem with striking patterns and a famously picky appetite.
Spotted Shrimp Goby
FishAmblyeleotris guttata
A reef sand specialist that shares its home with an almost-blind shrimp partner.
Spotted Toby
FishCanthigaster solandri
A compact reef puffer with vivid spotted patterning and a surprisingly mild temperament.
Squamosa Clam
InvertTridacna squamosa
A beginner-friendly giant clam with dramatic, fluted shell edges and vivid mantle colors.
Squaretail Bristletooth
FishCtenochaetus truncatus
A compact Indian Ocean grazer that earns its keep on nuisance algae.
Staghorn Coral
CoralAcropora millepora
A fast-growing reef builder that rewards precise water chemistry with dense, bushy colonies.
Staghorn Coral
CoralAcropora aculeus
A delicate table-forming Acropora with vivid blue-green and yellow color forms.
Staghorn Coral
CoralAcropora acuminata
A sharp-tipped table coral that demands pristine reef conditions to thrive.
Staghorn Coral
CoralAcropora austera
A branching reef-builder that demands turbulent water and intense light to thrive.
Staghorn Coral
CoralAcropora cervicornis
A fast-growing Atlantic branching coral that builds entire reef frameworks in the wild.
Staghorn Coral
CoralAcropora donei
A massive table coral with an architectural, layered form built for high-energy reefs.
Staghorn Coral
CoralAcropora globiceps
A compact, wave-battered reef coral with a distinctive dome-tipped branching form.
Staghorn Coral
CoralAcropora horrida
A branchy Indo-Pacific Acropora that thrives in turbid shallows and shows off pale blue polyps.
Staghorn Coral
CoralAcropora listeri
A morphologically unpredictable Acropora that reshapes itself to match wave energy.
Staghorn Coral
CoralAcropora lutkeni
A wave-battered reef builder demanding the strongest flow your tank can offer.