Tailspot Blenny (Ecsenius stigmatura) Care Guide
A tiny, adorable blenny with a distinctive dark spot at the base of the tail. Tan-brown body with subtle orange and blue markings. Perfect for nano reef aquariums due to its small size.
Compiled by Aquairi from published sources · Published · Updated
Overview
Ecsenius stigmatura is a species in the family Blenniidae. A tiny, adorable blenny with a distinctive dark spot at the base of the tail. Tan-brown body with subtle orange and blue markings. Perfect for nano reef aquariums due to its small size. Peaceful algae grazer that perches on rocks with a curious personality.
Taxonomy
- Family: Blenniidae
- Genus: Ecsenius
- Scientific name: Ecsenius stigmatura
- Origin: Western Pacific
Habitat
Native to the western Pacific from the Philippines and Indonesia south to the Great Barrier Reef. Inhabits clear lagoons and outer reef slopes at depths of 2-25 m, where it perches on coral and rocks and grazes microalgae and detritus from the substrate.
Tank requirements
- Minimum tank volume: 40 L
- Temperature: 24-27 °C
- pH: 8.1-8.4
- GH: 8-12 °dGH
- Water flow: moderate
- Adult size: 4-6 cm
- Lifespan: 3-5 years
- Difficulty: beginner
Diet
Classified as herbivore. Recommended feeding frequency: 2x daily. In captivity, offer a varied diet appropriate to the species — quality prepared foods supplemented with frozen or live items of suitable size.
Compatibility
- Temperament: peaceful
- Swimming level: bottom
- Compatible tank mates: Clownfish, Firefish Goby, Small Wrasses
- Avoid with: Other Blennies, Large Fish
Reef compatibility
Generally classified as reef-safe: does not feed on stony or soft corals, tridacnid clams or ornamental shrimps under normal conditions.
Breeding
- Breeding difficulty: advanced
Tailspot Blenny (Ecsenius stigmatura) Breeding Guide
Overview
Ecsenius stigmatura is a small combtooth blenny (family Blenniidae) from the Western Pacific, a perching, rock-grazing species suited to nano reefs. As a member of the genus Ecsenius it is a demersal egg-layer rather than a pelagic spawner. Spawning of Ecsenius blennies is reported as relatively common in aquaria, but rearing the larvae through to settlement has historically been very difficult, so home breeding of this species is advanced and seldom accomplished.
Sexing
External sexing of Ecsenius stigmatura is not documented in the consulted scientific sources. As in the genus generally, a functional pair is recognized when two compatible fish occupy and defend a shared nesting hole, making behavior the practical cue rather than fixed external markings.
Breeding Setup
Ecsenius blennies shelter in rock and use crevices and small holes as nest sites. A mature aquarium with live rock, established algae for grazing, and small-diameter tubes or holes that a pair can defend provides the structure these fish use for spawning. Stable reef parameters in the species ranges (temperature roughly 24-27 C, pH about 8.1-8.4) support conditioning.
Spawning Behavior & Trigger
Like other Ecsenius, the tailspot blenny deposits demersal eggs and tends a nest. Aquarium accounts of bred Ecsenius report compatible pairs spawning every few days and tending a large nest of multiple egg batches attached to a surface, with hatching roughly five days after laying (Reef Builders). Eggs are guarded at the nest rather than broadcast into open water.
Egg & Fry Care
The limiting step is larval rearing, not spawning. The first confirmed rearing of any Ecsenius (E. gravieri) was reported in 2014 after decades of failure, with a further commercial success on E. pulcher reported in 2024 (Reef Builders). Newly hatched larvae are tiny and pelagic and require very small live first foods; hobby sources indicate copepods such as Parvocalanus crassirostris may be needed before a transition to Artemia nauplii. No routine home protocol for Ecsenius stigmatura is documented.
Common Challenges
Spawning is straightforward; the planktonic larval phase is the bottleneck. Minute larvae, demanding live first-food cultures, and a long pelagic period have limited success to specialized hatcheries rather than home aquaria.