Massive Porites (Porites lutea) Care Guide
Porites lutea is a massive boulder-forming coral with tiny polyps, an extremely long-lived zooxanthellate reef builder listed as Least Concern by the IUCN.
Compiled by Aquairi from published sources · Published · Updated
Overview
Porites lutea is a massive stony coral in the family Poritidae, described by Milne Edwards & Haime in 1851. It forms smooth, hemispherical mounds or helmet-shaped colonies up to about 4 m across, with small, closely packed, thin-walled corallites of 1 to 1.5 mm. It is an extremely long-lived reef builder whose fossil microatolls indicate great antiquity.
Taxonomy
- Family: Poritidae
- Genus: Porites
- Scientific name: Porites lutea
- Authority: Milne Edwards & Haime, 1851
Habitat
The species occurs across the Indo-Pacific, from Madagascar and the east coast of Africa to Malaysia, Indonesia, the Philippines, Japan and northern and eastern Australia. It grows in very shallow water on reefs and can form structures in the intertidal zone.
Symbiosis and feeding
It contains symbiotic zooxanthellae that provide energy through photosynthesis; exposure to elevated iron can cause bleaching through zooxanthellae loss. In aquaria it is sustained mainly by lighting, with amino-acid supplements aiding its very slow growth.
Reef-tank requirements
- Lighting: 200-300 PAR (medium-high)
- Flow: medium
- Temperature: 24-26 °C (75-79 °F)
- pH: 8.1-8.4
- Specific gravity: 1.025-1.026
- Alkalinity (dKH): 7.5-9
- Calcium: 420-450 ppm
- Magnesium: 1300-1400 ppm
- Phosphate: below 0.05 ppm
- Nitrate: below 10 ppm
- Minimum tank maturity: about 6 months
Compatibility
It is a passive, reef-safe coral suitable alongside fish and shrimp. Growth is slow and reduced when the coral is stressed by higher water temperatures, so a mature, stable tank is recommended.
Conservation status
IUCN Red List: Least Concern (2014).
Porites lutea (Massive Porites) Propagation Guide
Overview
Porites lutea is a massive, boulder-forming coral of the family Poritidae. It builds smooth, hemispherical mounds or helmet-shaped colonies up to about 4 m across in the wild, and in intertidal zones it forms microatolls, disc-shaped mounds with dead skeleton on top and living tissue around the perimeter that keeps growing sideways. Like all Porites it carries symbiotic zooxanthellae.
Reproductive Mode
Porites lutea disperses both sexually, through larvae, and vegetatively. Fragments that become detached from a colony may remain alive and end up further down the reef slope, and in this way new colonies, or even new reefs, can form in places unsuitable for larval settlement. This natural fragmentation is the basis for any captive propagation of the species.
Fragging / Asexual Propagation
Unlike branching Porites, a massive colony is propagated by cutting a block or chunk from it rather than snapping a branch. Saw or cut a piece, then mount it on a rock or plug: dry the base of the block and the surface, apply cyanoacrylate glue, press it into place, and return it to gentle flow to cure. The living tissue then heals over the cut edge and slowly encrusts.
Conditions for Propagation
A cut piece needs stable reef chemistry, moderate to high light, and clean flow over the wound to help the tissue close. In the wild, colony growth is higher where wave action is greater and lower in calmer water, so a freshly cut frag benefits from good, consistent water movement during its long recovery.
Common Challenges
The main challenge is the slow healing of the large cut surface, which is vulnerable to algae before the tissue grows over it. Keep the cut clean with brisk flow, monitor closely, and accept that visible spread of a massive Porites frag is measured over many months.