Is the “Alaskan Gold” name literal, and how do I keep the gold color from fading?

It’s a trade name; Rhodactis sp. are Indo‑Pacific, not from cold waters. Gold tones hold best under moderate PAR (60–120), strong blue spectrum (420–470 nm), and stable, nutrient‑positive water (nitrate 5–15 ppm, phosphate 0.03–0.1). Too much white light washes color; too little light browns it. If it pales, lower intensity or extend blue photoperiod and feed small particle foods weekly.

Why does my mushroom inflate like a balloon or “walk” off its rock?

Rhodactis adjust position for light and flow by inflating/deflating and creeping. Sudden inflation with gaping mouth often signals stress: excess light, sharp alkalinity shifts, or bacterial irritation. Shade it, increase gentle, indirect flow, and stabilize parameters. If it detaches, place in a shallow cup with rubble and mesh until it reattaches; avoid strong flow that can tumble it.

Can Alaskan Gold Rhodactis sting or trap fish and other corals?

Yes—its sticky vesicles and marginal tentacles can irritate neighbors and occasionally trap small, slow fish at night (notably gobies or juvenile clowns attempting to “host”). Give 2–3 inches of space, run activated carbon, and maintain cross‑tank flow to dilute allelopathy. Avoid placing delicate SPS directly downstream. If clowns persistently nest in it, consider a surrogate host to reduce risk.

How do I propagate this morph while keeping losses low?

Use a clean scalpel to bisect through the mouth, then quarter if large. Rinse in tank water, optional dilute iodine dip, and place frags on rubble in a low‑flow, shaded basket. Expect shrinkage for a week; avoid heavy feeding until the mouth reforms. Maintain elevated but stable nutrients and do not exceed gentle PAR (~60–80) during recovery to prevent bleaching.

Alaskan Gold Rhodactis Mushroom Coral

Overview

Alaskan Gold Rhodactis Mushroom Coral shows a domed, textured cap with golden to green lobed vesicles. Rhodactis sp., a corallimorph (soft mushroom-type coral), does well in low to moderate light and gentle to moderate water flow. It is photosynthetic via symbiotic algae but will accept small meaty foods, which can speed growth and deepen color. Place it on stable rock with room to expand, as it can spread and may irritate nearby corals.

Quick Facts

Care Easy

Lighting Low–Moderate

Flow Low–moderate

Placement Low–Mid

Temperament Semi-aggressive (3–6 inches spacing)

Recommended Parameters

Temp 76–80°F

pH 8.1–8.4

Salinity 1.025–1.026

Calcium 380–430 ppm

AlkAlkalinity 8–10 dKH

Magnesium 1250–1350 ppm

Feeding photosynthetic, mysis shrimp, brine shrimp, finely chopped seafood, zooplankton, microplankton, powdered coral foods, small sinking pellets

Care & Placement

Alaskan Gold Rhodactis Mushroom Coral (Rhodactis sp.) thrives with low to moderate light and gentle, varied flow. Start it in shaded lower areas (sandbed or lower rockwork) and light-acclimate slowly using reduced intensity or screen layers to prevent bleaching; increase light only if color dulls. Provide gentle, indirect flow to keep detritus from settling while avoiding tissue lift or retraction. Feed once weekly with small meaty foods (mysis, finely chopped seafood) or fine particulate coral foods; turn off pumps briefly to allow uptake. Keep stable parameters: temperature 76–79°F, salinity 1.024–1.026 (refractometer), pH 8.1–8.4, alkalinity 8.0–9.5 dKH, calcium 400–450 ppm, magnesium 1250–1350 ppm, nitrate 5–15 ppm, phosphate 0.03–0.10 ppm. Sudden swings in salinity, alkalinity, or temperature can cause gaping mouths, detachment, or recession. Place on a small rock “island” to manage spread; allow 3–4 inches from SPS and fleshy LPS, as mushrooms can overgrow neighbors and have a mild sting. Compatibility is generally peaceful with softies and zoas but avoid direct contact. Acclimate by floating to match temperature, then drip 30–60 minutes. Common issues: bleaching from excess light (move to shade), shrinking or detachment from high flow or low nutrients (reduce flow, moderate nutrients), bacterial melt after injury (iodine dip, improve stability). Monitor weekly with reliable test kits and adjust slowly.

FAQ

Frequently Asked Questions

About the Alaskan Gold Rhodactis Mushroom Coral

Is the “Alaskan Gold” name literal, and how do I keep the gold color from fading?

It’s a trade name; Rhodactis sp. are Indo‑Pacific, not from cold waters. Gold tones hold best under moderate PAR (60–120), strong blue spectrum (420–470 nm), and stable, nutrient‑positive water (nitrate 5–15 ppm, phosphate 0.03–0.1). Too much white light washes color; too little light browns it. If it pales, lower intensity or extend blue photoperiod and feed small particle foods weekly.
Why does my mushroom inflate like a balloon or “walk” off its rock?

Rhodactis adjust position for light and flow by inflating/deflating and creeping. Sudden inflation with gaping mouth often signals stress: excess light, sharp alkalinity shifts, or bacterial irritation. Shade it, increase gentle, indirect flow, and stabilize parameters. If it detaches, place in a shallow cup with rubble and mesh until it reattaches; avoid strong flow that can tumble it.
Can Alaskan Gold Rhodactis sting or trap fish and other corals?

Yes—its sticky vesicles and marginal tentacles can irritate neighbors and occasionally trap small, slow fish at night (notably gobies or juvenile clowns attempting to “host”). Give 2–3 inches of space, run activated carbon, and maintain cross‑tank flow to dilute allelopathy. Avoid placing delicate SPS directly downstream. If clowns persistently nest in it, consider a surrogate host to reduce risk.
How do I propagate this morph while keeping losses low?

Use a clean scalpel to bisect through the mouth, then quarter if large. Rinse in tank water, optional dilute iodine dip, and place frags on rubble in a low‑flow, shaded basket. Expect shrinkage for a week; avoid heavy feeding until the mouth reforms. Maintain elevated but stable nutrients and do not exceed gentle PAR (~60–80) during recovery to prevent bleaching.