Candy cane coral care

Quick reference

What is a candy cane coral?

Caulastraea furcata grows as a cluster of separate tubular branches, each tipped with a large polyp that is often green, yellow or greenish brown.^{[8, 6]} SeaLifeBase gives its range as Somalia and Madagascar east to Samoa, at 0–40 m, on protected reef slopes with partly sandy bottoms and in lagoons;^[9] Wikipedia gives a narrower range, from Fiji to Australia and possibly toward Thailand.^[6] In Bali, Reef Builders found it mostly in muck and sandy-bottom habitats, where colonies can break loose and lie on the sand.^[5] Polyps multiply by splitting: a round polyp stretches into a figure-8 with two mouths, then divides.^{[5, 1]} Its zooxanthellae supply most of its food, and it also catches zooplankton.^[6]

The IUCN rates it Least Concern, and like all reef-building stony corals it is on CITES Appendix II.^{[9, 10]} Caulastraea was the 11th most-imported coral genus in CITES records from 1990 to 2021, and Hoeksema notes that cultivated Indonesian colonies are as popular as wild-caught ones.^[11]

Lighting for a candy cane coral

Low to moderate, and it isn't fussy. The only PAR numbers come from growers and sellers, and they disagree: Tidal Gardens calls 50–70 PAR the sweet spot for growth and colour and warns mainly against too much light, while ORA's maricultured candy canes are listed at 150–250 PAR.^{[1, 2]} We found no independent measurement. Tidal Gardens' main lighting warning is overexposure, so start it lower rather than higher.^[1] SeaLifeBase notes that no bleaching was observed in Palau.^[9]

Flow and placement

Low to moderate. Tidal Gardens prefers low flow and warns that too much makes the polyps lose their fleshiness; ORA's listing and LiveAquaria say moderate.^{[1, 2, 7]}

Feeding

Mostly photosynthetic, and it also catches zooplankton.^[6] Feeding can help growth: Tidal Gardens spot-feeds frozen mysis, bite-sized krill or LPS pellets two to three times a week, ideally with the pumps off, and notes that fish may steal the food.^[1] LiveAquaria suggests brine shrimp or microplankton weekly.^[7]

Aggression and spacing

One of the least aggressive LPS. Tidal Gardens says candy canes use sweeper tentacles far less than most LPS, and LiveAquaria calls them very short.^{[1, 7]} No source gives how far they reach, so leave a small gap anyway. Stressed polyps can push out white mesenterial filaments, which WetWebMedia's crew say are a stress response, not parasites.^[19]

Tankmates

We found no published reports of fish or invertebrates that target candy canes specifically. WetWebMedia's crew say fish-bitten polyps should recover, though the bitten skeleton may not regrow.^[19] As general LPS advice, Top Shelf Aquatics says large angelfish graze fleshy LPS, dwarf angelfish may nip them and most butterflyfish eat them.^[20]

Fragging and propagation

Each branch carries its own polyp, so frags are simple. Cut a branch at its base with coral cutters or pliers, or with a band saw for a flat base that's easier to glue, then mount it on a plug with glue or epoxy.^{[3, 4, 1]} Practical Fishkeeping calls Caulastrea a good first coral to frag.^[4] In an Indonesian lab study, fragments of one to four polyps all grew, and fragment size made no significant difference to growth.^[21]

Troubleshooting

Common mistakes

• •Giving it too much light, Tidal Gardens' main lighting warning.^[1]
• •Blasting it with flow, which makes the polyps lose their fleshiness.^[1]
• •Assuming every 'trumpet' is the same coral: the trade's C. curvata is now Astraeosmilia.^{[12, 16]}
• •Burying living tissue when setting a colony in sand; a colony lying on its side is fine if the tissue stays clear.^[5]
• •Mistaking stress filaments for parasites.^[19]
• •Expecting fast growth without feeding: Tidal Gardens doesn't call feeding required, but says it can really help growth.^[1]

Equipment & food for this species

Affiliate links. As an Amazon Associate, reefcalcs earns from qualifying purchases, at no extra cost to you.

Most LPS benefit from occasional target-feeding, and a dip on new frags catches hitchhiking pests before they reach the display.

Candy cane coral FAQ

Is candy cane coral aggressive?

Not very. Tidal Gardens says candy canes use sweeper tentacles far less than most LPS, and LiveAquaria calls them very short.^{[1, 7]} No source gives a sting distance, so leave a small gap anyway.

How much PAR does a candy cane coral need?

The published figures come from growers and sellers, not studies: Tidal Gardens recommends 50–70 PAR and ORA's listing says 150–250.^{[1, 2]} Tidal Gardens' main lighting warning is overexposure, so start low.^[1]

How often should you feed candy cane coral?

It gets most of its food from its zooxanthellae and also catches zooplankton.^[6] Tidal Gardens spot-feeds mysis, krill or LPS pellets two to three times a week to speed growth; LiveAquaria suggests weekly.^{[1, 7]}

How do you frag a candy cane coral?

Cut a branch at its base with cutters, pliers or a band saw (a band saw gives a flat base that's easier to glue), then mount it with glue or epoxy.^{[3, 4, 1]} In a lab study, frags of one to four polyps all grew.^[21]

Why does my candy cane coral look like a figure 8?

That's how it multiplies: a polyp stretches into a peanut or figure-8 shape with two mouths, then splits into two.^{[5, 1]}

Is trumpet coral the same as candy cane coral?

Often, but not always. 'Trumpet' is a common name for C. furcata, but stores also use it for other species.^{[6, 17]} Since 2021 the trade's C. curvata has been placed in a separate genus, Astraeosmilia; only C. furcata and C. echinulata remain in Caulastraea.^{[12, 16]}

Are candy cane corals wild-collected or aquacultured?

Both. CITES trade records show large numbers of wild-caught and cultivated Caulastraea, mainly from Indonesia, and Hoeksema (2026) says cultivated colonies are as popular as wild ones.^[11] The IUCN rates the species Least Concern, and it is listed on CITES Appendix II.^{[9, 10]}