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Smooth-Fin Blenny (Ecsenius frontalis)

Find Smooth-Fin Blenny across reef-livestock retailers and from fellow hobbyists on ReefDock. Compare sources, check live pricing where available, and review source-tank parameters on Reef-Trak-verified fish listings before you buy.

Smooth-Fin Blenny
Photo: (c) Emily Troyer, some rights reserved (CC BY-NC), uploaded by Emily Troyer · cc-by-nc
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Where to buy Smooth-Fin Blenny

ReefDock searches the following reef retailers for this fish. Click through to see the live price.

  • Saltwaterfish

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  • Amazon

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  • Petco

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About Smooth-Fin Blenny

Ecsenius frontalis is a small blenny with a streamlined body and smooth dorsal fin (lacking the spiny anterior differentiation seen in many blennies). Coloration is typically brownish to tan with subtle mottling or banding patterns that provide camouflage in reef environments. The head is proportionally large with well-developed eyes and distinctive facial characteristics typical of the genus.

Key facts

Feeding Schedule
1-2 times daily
Care Level
Moderate
Min tank size
20 gallons
Max Size
5.5
Common Health Issues
Parasitic infections (particularly Ichthyophthirius), bacterial infections, malnutrition if diet is inadequate
Origin
Indo-Pacific region, including the Red Sea, East Africa, and extending to the Central Pacific. Found in coral reef environments across a wide geographic distribution.
Care Requirements
• 20 gallon tank minimum; prefers established reefs with stable conditions • pH 8.1-8.3, salinity 1.023-1.025, temp 72-78°F, calcium 400-450 ppm • Abundant live rock with crevices for hiding and grazing on microalgae • Peaceful blenny; may nip at small crustaceans but generally reef-safe • Weekly water changes 10-20%; moderate water flow
Diet
omnivore
Diet Details
In captivity, feed a varied diet of small frozen foods such as copepods, amphipods, mysis shrimp, and small pellets. Supplement with vegetable matter occasionally (nori, spirulina flakes). Feed once or twice daily in small amounts.
Temperament
Peaceful
Reef safety
Reef Safe
Difficulty Level
Moderate difficulty. While hardy once acclimated, Ecsenius frontalis requires stable water conditions, a well-established reef aquarium with adequate micro-habitat, and a varied diet of small foods to thrive long-term.

Looking for a hobbyist seller?

ReefDock's marketplace lets reef-keepers sell fish directly to other reef-keepers with Stripe-secured checkout and live-arrival photo confirmation. Browse current fish listings on ReefDock, or list your own.

Verify the source tank before you buy

ReefDock is the sister app to Reef Trak. Sellers who maintain a Reef Trak tank log can publish source-tank parameters on eligible fish listings — so you can see the conditions a fish was raised in before you buy. Log this fish on Reef Trak.

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