Aiptasia

1. Name & Classification

• Common Names: Glass Anemone, Rock Anemone, Tube Anemone

• Scientific Name: Aiptasia spp. (notably Aiptasia pallida, Aiptasia pulchella)

• Type: Cnidarian (Anthozoa), Invertebrate Pest

2. Appearance (Description, Color, Shape, Size)

• Description: Semi-transparent to brownish anemone with long, thin tentacles radiating from a central mouth.

• Color: Translucent, beige, brown, or grayish; may appear greenish under certain lighting due to symbiotic algae.

• Shape: Palm-like structure with a smooth column and waving tentacles.

• Size Range: From tiny (2–3 mm) to large (~5 cm+ when fully extended).

• Distinctive Features: Can rapidly retract into crevices when disturbed; often found in shaded or hard-to-reach areas.

3. Where It’s Found (In the Tank & How It’s Introduced)

• Typical Location in Aquarium: Commonly attaches to live rocks, coral bases, frag plugs, and within crevices or overflows.

• Usual Entry/Trigger: Introduced via contaminated live rock, coral frags, or equipment; proliferation often triggered by elevated nutrient levels and lack of natural predators.

4. Impact / Damage

• What Damage or Negative Effects It Causes:

• Corals: Stings and outcompetes nearby corals, leading to tissue necrosis and inhibited growth.

• Fish/Inverts: Can irritate or sting small fish and invertebrates; may cause stress or injury.

• Aesthetics: Rapid proliferation leads to unsightly infestations, detracting from tank appearance.

• Severity: High; known for aggressive growth and difficulty in eradication.

5. Reproduction / Spread

• Method: Both sexual (broadcast spawning) and asexual reproduction (pedal laceration, budding).

• Rate/Speed of Growth: Rapid; a single individual can lead to widespread infestation in a short period.

• Specific Life Stages: Capable of regenerating from small tissue fragments; larvae can settle and form new colonies.

6. Control / Treatment

• Manual Removal: Challenging; physical removal often leads to fragmentation, promoting further spread.

• Chemical Treatments:

• Aiptasia-X: A reef-safe solution that induces ingestion and internal destruction.

• Joe’s Juice: A paste applied directly to the anemone, causing rapid demise.

• Kalkwasser (Calcium Hydroxide): Injected into the oral disc; effective but can alter water chemistry.

• Hydrogen Peroxide: Used cautiously; can be effective but poses risks to tank inhabitants.

• Environmental Adjustments:

• Maintain optimal water quality to reduce stress on desired organisms.

• Implement a fallow period (fishless) in the display tank to break the life cycle.

• Difficulty to Eliminate: High; requires consistent and targeted efforts to prevent resurgence.

7. Biological Controls / Predators

• Known Predators:

• Berghia stephanieae: A nudibranch that exclusively feeds on Aiptasia; effective but may starve once Aiptasia is eradicated.

• Peppermint Shrimp (Lysmata wurdemanni): Known to consume Aiptasia, though effectiveness varies.

• Aiptasia-Eating Filefish (Acreichthys tomentosus): Consumes Aiptasia but may also nip at corals.

• Copperband Butterflyfish (Chelmon rostratus): Eats Aiptasia but can be challenging to keep and may harm other invertebrates.

• Effectiveness & Considerations: Biological controls can be effective but may have unintended consequences; monitor tank inhabitants closely.

8. Prevention / Quarantine Measures

• Outside the Tank:

• Thoroughly inspect and quarantine new live rock and coral frags before introduction.

• Clean equipment and tools to prevent cross-contamination between tanks.

• In the Tank:

• Maintain optimal water quality with regular testing and water changes.

• Implement a robust clean-up crew to manage detritus and uneaten food.

9. Additional Notes / Tips

• Prevention: Early detection and intervention are key; monitor tank regularly for signs of Aiptasia.

• Learned Lessons: Avoid manual removal unless absolutely necessary; fragmentation can exacerbate the problem.

• Special Warnings: Some treatments may affect beneficial organisms; use with caution in tanks housing such species.