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Bubble Coral Starter Care Guide

A practical introduction to bubble coral care, including health risks, water quality, tank setup, food and behaviour.

By WiseTails EditorialReviewed September 22, 2026
General information, not a diagnosis

Use this guide to notice and organize information. Contact a qualified veterinarian for medical concerns or urgent change.

About the Bubble Coral

Bubble corals are large-polyp stony corals that inflate rounded, grape-like vesicles during the light period. Those bubbles are living tissue over a sharp skeleton, not tough air sacs.

At night the bubbles may shrink while feeding and sweeper tentacles extend, making the coral's reach much larger than expected.

Health risks to know about

Important concerns include tissue tears, brown-jelly-like infections, rapid tissue recession, bleaching, alkalinity or salinity swings, copper exposure and stings from nearby corals.

A torn or receding edge, brown mucus, a gaping mouth, repeated failure to inflate or rapidly exposed skeleton needs prompt expert advice.

Tank, water and equipment

Use a mature reef aquarium with stable chemistry, suitable moderate lighting, low-to-moderate indirect flow and plenty of open space around the colony.

Monitor salinity, alkalinity, calcium and magnesium. Handle only the hard base and keep the expanded tissue from rubbing on rock.

Food and feeding

Lighting supports much of its nutrition, and suitable small marine foods can be offered when feeding tentacles are visible.

Avoid large food pieces that may be difficult to digest and remove rejected food promptly.

Behaviour, tank mates and enrichment

Daytime inflation and nighttime tentacle extension are normal. Strong direct flow that keeps one side collapsed can damage the tissue.

Bubble coral can send out long stinging sweepers after dark, so leave a generous buffer even when daytime bubbles look compact.

When to contact an aquatic veterinarian

Get help for gasping, collapse, severe wounds, major swelling, inability to stay upright, rapid unexplained deaths or a problem that continues after water parameters are corrected.

Test ammonia, nitrite, nitrate, pH, temperature and salinity whenever behaviour changes. Water quality is part of the medical history, so record results before contacting an aquatic veterinarian.

SOURCES & RIGHTS

Read the supporting material

These sources stay with their original publishers. WiseTails links to them and provides its own summary; it does not republish their text or images.

01professional org · Ornamental Aquatic Trade AssociationHow to Look After Large Polyp Stony Corals

Supports the species-specific care summary for Bubble Coral.

Original source ↗
02professional org · Ornamental Aquatic Trade AssociationHow to Test for Water Quality in a Marine Tank / Aquarium

Supports the aquarium cycling and water-quality context used in this guide.

Original source ↗
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