Why does my Raspberry Blastomussa swell and deflate throughout the day, and when is it a concern?

Normal diurnal inflation helps the coral feed and shed mucus. Brief deflation after feeding or maintenance is typical. Red flags: prolonged shrinking, gaping mouths, or tissue pulling from the skeleton. Check for excess light, sudden alkalinity/salinity swings, vermetid snail irritation, and detritus trapped under the flesh. Gentle, indirect flow that lifts debris without lifting tissue usually restores the coral’s full, puffy extension.

How can I keep its raspberry coloration from fading or browning?

Color shifts with spectrum, nutrients, and stress. This coral often shows best reds under blue-heavy lighting with moderate PAR; too much white or intensity can wash it out or bleach it. Keep nitrate and phosphate measurable but not high, and avoid rapid nutrient drops. Target-feed small meaty foods weekly for depth of color. Stability in alkalinity and temperature helps maintain pigment expression and prevents dulling.

My colony has receding tissue at the base while the tops look fine—what’s the usual culprit?

Detritus accumulation under fleshy skirts is common, especially on sandbeds or in low, stagnant pockets. The trapped debris fosters bacterial irritation and localized dieback. Lift the colony slightly on a ring or frag stand, increase indirect flow to roll debris away, and turkey-baste weekly. Inspect and remove nearby vermetid snails. A mild antiseptic dip can halt early recession when combined with improved cleanliness.

Can Blastomussa wellsi be outcompeted or stung despite its thick flesh?

Yes. It has short sweepers and loses to many aggressive LPS and fast-spreading soft corals. Keep distance from Euphyllia, Favias, and stinging chalices. Avoid adjacency to GSP, clove polyps, or invasive zoas that can shade and overgrow the rim. Provide a clear perimeter and moderate, laminar-free flow. If encroachment begins, prune neighbors promptly and rotate the colony to expose shaded lobes to balanced light.

Raspberry Blastomussa Coral

Blastomussa

Overview

Raspberry Blastomussa Coral shows fleshy, round polyps with raspberry-red mantles and contrasting mouths. Blastomussa wellsi is a large-polyp stony coral that forms clustered heads and prefers moderate light with low to moderate, gentle water flow. It is photosynthetic through symbiotic algae but benefits from occasional small meaty feedings to support growth and maintain color. Place it on stable rock or sand with space around it, as short sweeper tentacles can sting nearby corals at night.

Quick Facts

Care Moderate

Lighting Low–Moderate

Flow Low–Moderate

Placement Low–Mid

Temperament Semi-aggressive (3 inches spacing)

Recommended Parameters

Temp 76–80°F

pH 8.1–8.4

Salinity 1.025–1.026

Calcium 400–450 ppm

AlkAlkalinity 8–9.5 dKH

Magnesium 1280–1350 ppm

Feeding photosynthetic, mysis shrimp, enriched brine shrimp, copepods/zooplankton, microplankton, finely chopped marine meats (clam, shrimp), coral-specific powdered foods, small sinking LPS pellets

Care & Placement

Raspberry Blastomussa Coral (Blastomussa wellsi) thrives with stable, low-to-moderate light and gentle, indirect flow. Target 50–120 PAR; too much light causes bleaching and tissue recession. Provide a random, soft current to keep detritus from settling between polyps without blasting the flesh. Feed 1–3 times weekly with fine meaty foods (mysis, chopped krill, enriched brine, reef foods) when feeder tentacles are out, or after lights dim; feeding supports growth and color. Maintain temp 24–26°C (75–79°F), pH 8.1–8.4, salinity 1.025–1.026, alkalinity 8.0–9.5 dKH, calcium 400–450 ppm, magnesium 1250–1350 ppm, nitrate 2–10 ppm, phosphate 0.03–0.08 ppm. This species dislikes rapid swings—keep parameters steady. Test weekly, use a refractometer for salinity, and a temperature controller if possible.Place low to mid in the tank, on sand or a stable rock ledge, avoiding shadows from faster growers. Leave 5–8 cm (2–3 in) space; it’s generally peaceful but can extend short sweepers, and many neighbors (favia, galaxea, some torches) can sting it. Acclimate with a 30–60 minute drip and reduce light intensity for the first 1–2 weeks (or use screen layers). Common issues: bleaching (reduce light, increase feeding), recession (soften flow, check alkalinity stability, inspect for pests), and detritus buildup (adjust flow, gentle turkey baster, siphon during water changes). Handle only by the plug or rock; avoid touching the fleshy polyps.

FAQ

Frequently Asked Questions

About the Raspberry Blastomussa Coral

Why does my Raspberry Blastomussa swell and deflate throughout the day, and when is it a concern?

Normal diurnal inflation helps the coral feed and shed mucus. Brief deflation after feeding or maintenance is typical. Red flags: prolonged shrinking, gaping mouths, or tissue pulling from the skeleton. Check for excess light, sudden alkalinity/salinity swings, vermetid snail irritation, and detritus trapped under the flesh. Gentle, indirect flow that lifts debris without lifting tissue usually restores the coral’s full, puffy extension.
How can I keep its raspberry coloration from fading or browning?

Color shifts with spectrum, nutrients, and stress. This coral often shows best reds under blue-heavy lighting with moderate PAR; too much white or intensity can wash it out or bleach it. Keep nitrate and phosphate measurable but not high, and avoid rapid nutrient drops. Target-feed small meaty foods weekly for depth of color. Stability in alkalinity and temperature helps maintain pigment expression and prevents dulling.
My colony has receding tissue at the base while the tops look fine—what’s the usual culprit?

Detritus accumulation under fleshy skirts is common, especially on sandbeds or in low, stagnant pockets. The trapped debris fosters bacterial irritation and localized dieback. Lift the colony slightly on a ring or frag stand, increase indirect flow to roll debris away, and turkey-baste weekly. Inspect and remove nearby vermetid snails. A mild antiseptic dip can halt early recession when combined with improved cleanliness.
Can Blastomussa wellsi be outcompeted or stung despite its thick flesh?

Yes. It has short sweepers and loses to many aggressive LPS and fast-spreading soft corals. Keep distance from Euphyllia, Favias, and stinging chalices. Avoid adjacency to GSP, clove polyps, or invasive zoas that can shade and overgrow the rim. Provide a clear perimeter and moderate, laminar-free flow. If encroachment begins, prune neighbors promptly and rotate the colony to expose shaded lobes to balanced light.

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