Torch coral

Geographical Origin & Biotope:

The Torch Coral (*Euphyllia glabrescens*) is a highly prized, spectacularly beautiful Large Polyp Stony (LPS) coral natively endemic to the warm, sunlit coral reefs and sheltered lagoons of the Indo-Pacific Ocean, Australia, and the Red Sea. Their natural biotope is defined by expansive reef slopes and turbid lagoon environments where they anchor their heavy skeletons into the rockwork, exposing their long, flowing tentacles to moderate, rhythmic tidal currents.

Taxonomy & Morphology:

Scientifically classified within the Euphylliidae family, they are an LPS coral featuring a heavy, branching, calcified skeleton (corallite). Morphologically, they are instantly identifiable and breathtaking. At the tip of each skeletal branch is a fleshy polyp that extends dozens of extremely long, thin, flowing tentacles. Defining Feature: Unlike the Hammer or Frogspawn coral, the Torch Coral's tentacles end in a single, perfectly round, ball-like tip (resembling a lit torch).

Social Behavior:

They are sessile invertebrates, but they are exceptionally aggressive and territorial. They require significant real estate. CRITICAL BEHAVIOR: At night, the Torch Coral will deploy specialized "sweeper tentacles" that can reach 4 to 6 inches (10-15 cm) beyond its normal polyp extension. These sweepers are heavily loaded with potent stinging cells (nematocysts) designed to biologically burn, sting, and kill any competing corals within their radius.

Coloration & Sexual Dimorphism:

Sexual dimorphism is non-existent. Their coloration is staggering and highly variable, driving massive demand in the hobby. The long, fleshy tentacles are typically deep purple, rich brown, or striking green. The rounded tips are highly contrasting, presenting in blinding neon green, electric yellow, or bright pink. Specific color morphs, such as the "Aussie Gold Torch" or "New York Knicks Torch," exhibit intense, glowing neon yellow and orange hues and command premium prices.

Tank Setup:

The aquarium architecture MUST accommodate their aggressive nature and massive tentacle extension. A minimum 110-liter (30-gallon) marine aquarium is required. CRITICAL REQUIREMENT: They MUST be given extreme isolation. Leave at least 6 inches (15 cm) of completely open space around the coral in all directions to prevent its sweeper tentacles from murdering neighboring corals. Securely epoxy the skeletal base to the rockwork to prevent it from being knocked over.

Diet & Feeding:

They are highly autotrophic, deriving most of their daily energy from the photosynthesis performed by their symbiotic zooxanthellae algae under moderate to high lighting. However, they are also aggressive, carnivorous hunters. Target feeding is highly recommended and dramatically accelerates skeletal growth and tentacle extension. Gently feed the polyps 1-2 times a week with thawed Mysis shrimp, Krill, or specialized LPS coral pellets using a turkey baster.

Water Quality:

As heavily calcified LPS corals, they are acutely sensitive to water chemistry and require pristine parameters. They demand stable tropical heat (24-27°C / 75-81°F) and salinity between 1.024 and 1.026. CRITICAL REQUIREMENT: They MUST have highly stable, impeccable Calcium (420-450 ppm), Alkalinity (8-10 dKH), and Magnesium (1300-1400 ppm) levels to continually grow their massive branching skeletons. Fluctuations in Alkalinity will cause rapid polyp bailout or tissue death.

Compatibility & Tankmates:

Compatibility requires extreme caution due to their severe aggression. They will brutally sting and kill SPS corals, soft corals, and even other LPS corals. Interestingly, they are often compatible with other *Euphyllia* species (like Frogspawn), but Torch Corals are known to occasionally turn on and sting even their close cousins. They are an ideal surrogate host for Clownfish, which will happily wallow in their long tentacles just like a true sea anemone.

Aquarium Breeding:

Propagating (fragging) the Torch Coral is straightforward but requires mechanical tools. Because they possess a branching skeleton, aquarists can simply use a Dremel tool or heavy bone shears to cut through the dead, calcified stalk well below the fleshy polyp. CRITICAL WARNING: Never cut into or tear the fleshy polyp tissue itself, as this will almost certainly result in a lethal bacterial infection. The severed skeletal branch is simply glued to a frag plug.

Risks & Diseases:

CRITICAL DISEASE RISK: *Euphyllia* corals are highly susceptible to "Brown Jelly Disease" (BJD), a rapid, highly lethal ciliate/bacterial infection that turns the fleshy tentacles into a rotting brown mass. It can destroy a colony in 24 hours. The second major risk is inappropriate flow; flow that is too strong will brutally tear the delicate tentacles against the sharp skeleton, causing infection and death. They require moderate, gentle, chaotic flow.