Accounts of its natural feeding differ in emphasis. Some observations describe grazing on algae across reef and rubble habitat, while others characterize the species mainly as a picker of zooplankton and drifting particles rather than a committed algae grazer. Either way, treat it as an omnivore and build the menu accordingly rather than relying on grazing alone to keep it fed.
Offer algae-based prepared foods or small pellets alongside frozen mysis shrimp, enriched brine shrimp, and other finely chopped meaty items sized for a small mouth. New arrivals typically take prepared foods readily, which makes establishment straightforward. Small portions once or twice daily work well, and consistent feeding is worth the effort here because underfed individuals are the ones most likely to sample corals and clam mantles.
On the reef side, exercise caution. The species is frequently described as compatible with corals and most invertebrates, yet individual fish have been reported nipping or consuming Tridacna clam mantles, sometimes fatally, and nipping at LPS corals when underfed or crowded. Because that risk cannot be predicted specimen by specimen, it is not classified as reef safe here, and it is a poor choice for a display built around ornamental giant clams. Aquarists with mixed reefs who accept the risk should provide generous rockwork, avoid crowding, and feed well.
FAQ
Frequently Asked Questions
About the Flametail Blenny
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What aquarium size should I plan for?
Plan on a 30-gallon aquarium or larger for long-term adult housing. Smaller footprints are sometimes suggested, but 30 gallons is the figure most consistently supported. -
Can a Flametail Blenny be kept with corals and ornamental clams?
It is not considered reef safe, since some individuals nip or consume Tridacna clam mantles and may harass LPS corals when underfed or crowded. Avoid it in systems featuring ornamental giant clams. -
Can I keep it with another blenny?
Usually not. Keep one per aquarium unless you have a confirmed pair, because similar-looking blennies and elongated gobies tend to provoke territorial aggression.