Why does it look different during the day and at night?

During the day, Bubble Coral inflates its polyps into balloon-like vesicles to maximize photosynthesis. At night the vesicles deflate and sweeper tentacles extend instead to catch food. This is completely normal behavior.

Do I need to feed it directly?

It gets some nutrition from photosynthesis, but direct feeding is considered helpful for keeping it in good condition. Offering small live foods like brine shrimp near its tentacles usually triggers a feeding response.

Is it safe to place near other corals?

The sweeper tentacles it extends at night carry stinging cells that can irritate corals placed too close. It's best to leave adequate space between it and its neighbors.

How long can it live?

According to available data, it can live 10 years or more with proper care. Maintaining a stable tank environment is key to long-term success.

Can beginners keep this coral?

Bubble Coral is generally considered suited to intermediate keepers, since it requires some experience managing lighting and flow. Gaining basic coral-keeping experience first is recommended before adding this species.

Bubble Coral

The Bubble Coral is an LPS species known for the balloon-like vesicles that inflate from its polyps during the day, giving each colony a soft, bubbly appearance. At night those bubbles retract and long sweeper tentacles emerge instead, so the coral takes on a completely different look after dark. It responds well to feeding, often grasping brine shrimp or similar foods offered directly to its tentacles, which makes it a rewarding coral for keepers who enjoy hands-on care. Because it relies on both photosynthesis and feeding, getting lighting and water flow right takes some experience, which is why it's generally considered suited to intermediate keepers. With attentive care, Bubble Corals are reported to live 10 years or longer, making them a coral you can enjoy for the long term.

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About Bubble Coral

The Bubble Coral is an LPS species whose polyps inflate into bubble-like vesicles by day and contract at night. It feeds well and suits intermediate reef keepers, often living 10+ years with proper care.

7 things to know before welcoming a Bubble Coral

1Day-Night Transformation
During the day, Bubble Coral polyps swell into large, balloon-like vesicles. At night those vesicles deflate and sweeper tentacles extend instead, so the coral looks quite different depending on when you view it. Watching this daily transformation is one of the joys of keeping this species.
2Feeds Readily
Bubble Coral responds well to direct feeding, actively grasping brine shrimp and similar foods with its tentacles. Since it relies on both photosynthesis and feeding for nutrition, working regular feedings into your routine is recommended.
3Best for Intermediate Keepers
Balancing lighting, flow, and water quality takes some experience, which is why this species is generally considered suited to intermediate reef keepers. Building basic coral-keeping experience first makes it easier to maintain long term.
4Give It Space From Neighbors
The sweeper tentacles it extends at night carry stinging cells that can irritate nearby corals if they come into contact. Place it with enough clearance from other corals to avoid conflicts.
5Avoid Excessive Flow
Inflated polyps exposed to strong, direct water flow for long periods can suffer tissue damage. Choose a spot with gentle, indirect flow rather than a high-flow area.
6A Long-Term Companion
With consistent care, Bubble Corals are reported to live 10 years or more, making them a species you can keep for the long haul. Let it settle into a stable tank environment and monitor its condition as you gradually acclimate it.
7Check Tank Conditions First
Before bringing home a Bubble Coral, confirm that your tank's lighting, flow, and water quality are already stable. It may stay less inflated right after being introduced to a new environment, but it should gradually settle in and show its normal bubble shape over time.

Frequently asked questions about Bubble Coral

Q.Why does it look different during the day and at night?: A.During the day, Bubble Coral inflates its polyps into balloon-like vesicles to maximize photosynthesis. At night the vesicles deflate and sweeper tentacles extend instead to catch food. This is completely normal behavior.
Q.Do I need to feed it directly?: A.It gets some nutrition from photosynthesis, but direct feeding is considered helpful for keeping it in good condition. Offering small live foods like brine shrimp near its tentacles usually triggers a feeding response.
Q.Is it safe to place near other corals?: A.The sweeper tentacles it extends at night carry stinging cells that can irritate corals placed too close. It's best to leave adequate space between it and its neighbors.
Q.How long can it live?: A.According to available data, it can live 10 years or more with proper care. Maintaining a stable tank environment is key to long-term success.
Q.Can beginners keep this coral?: A.Bubble Coral is generally considered suited to intermediate keepers, since it requires some experience managing lighting and flow. Gaining basic coral-keeping experience first is recommended before adding this species.

Useful tools for Bubble Coral care

💧Aquarium Volume CalculatorCalculate water volume, weight, and heater wattage from tank dimensions 🧪Water Quality CheckerFind compatible fish, shrimp, plants & corals based on pH, temperature & hardness 💡Lighting CalculatorCalculate optimal LED lighting based on tank size and plants/corals 🔄Nitrogen Cycle GuideAuto-calculate bacteria colonization timeline for new tank cycling 🗓️Seasonal Care CalendarMonthly care events and seasonal management tips at a glance 🚿Water Change CalculatorAuto-calculate optimal water change frequency and volume by tank size and fish count 🐠Stocking CalculatorCalculate max fish capacity for your tank size with overstocking alerts ⚡Electricity Cost SimulatorCalculate monthly and annual electricity costs for care equipment with presets 🏞️Tank Layout PlannerGet substrate, plant & hardscape suggestions based on tank size and style 🧮Care Cost SimulatorEstimate initial, monthly & annual costs by category, care level and quantity ⚖️Species Comparison ToolCompare two species side by side: care difficulty, size, lifespan & temperature 🚚Transport Safety CheckerCheck transport safety score and precautions by category, season, method and distance ⏱️Quarantine & Acclimation TimerManage quarantine periods and acclimation steps with countdown timers. Includes recommended durations by species

Learn more about Bubble Coral in the encyclopedia

View Bubble Coral encyclopedia entry →

Care difficulty, lifespan, size and diet — all basics covered.

Bubble Coral related articles

Bubble Coral (Plerogyra) Care Guide | Expanding Grape Bubbles and Tips on Water Flow, Feeding, and Placement

A detailed guide to caring for bubble corals (Plerogyra sinuosa). Covers the conditions that cause the unique grape bubbles (bubble-like polyps) to expand and reasons for contraction, proper lighting and water flow settings, tentacle and feeding methods, placement considerations, the impact of sweeper tentacles on adjacent corals, and solutions to common problems.

Goniopora (Bubble Coral) Care Guide | Tips for Long-term Maintenance and Feeding

Learn the methods for successfully keeping Goniopora (Bubble Coral) long-term, a species considered difficult to maintain. We introduce proper lighting and water flow, the importance of regular feeding, the causes and solutions for polyps retracting, and recommended placement locations.

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