Will a Starry Blenny eat my corals?

They are generally reef-safe and ignore corals, focusing instead on algae. However, if a Starry Blenny is underfed and lacking its natural diet, it may occasionally nip at the mantles of Tridacna clams or the fleshy tissue of certain LPS corals.

Can I keep two Starry Blennies in the same tank?

It is highly discouraged unless you have a confirmed mated pair and a very large aquarium. They are aggressively territorial towards their own species and will often fight to the death in confined spaces.

Why does my Starry Blenny keep changing colour?

This is entirely normal behaviour. They are masters of camouflage and will alter their shades from deep black to mottled grey or brown depending on their mood, stress levels, and the background they are resting on.

Does the Starry Blenny need a lid on the aquarium?

Yes, a tight-fitting lid or a mesh screen is essential. Blennies have a startle reflex that causes them to dart rapidly, and they are notorious for jumping out of open-top aquariums.

Why does my Starry Blenny have a sunken belly?

A sunken belly is a clear sign of malnutrition. Because they are constant grazers, they need plenty of natural algae on live rock or regular daily supplements of nori (dried seaweed) and spirulina to maintain a healthy weight.

MarineMarineIntermediate

Starry Blenny

Salarias ramosus

The Starry Blenny is a charismatic, algae-grazing marine fish known for its expressive, alien-like face and spectacular white-spotted camouflage.

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Ideal Conditions

Temperature: 23 – 27 °C
pH range: 8.1 – 8.4
Hardness: 8 – 12 dGH
Salinity: 1.021 – 1.026 SG
Adult size: 10 – 14 cm
110L: 110 litres+
Lifespan: 2 – 5 years
Diet: Herbivore
Water flow: Moderate
Preferred setup: Abundant live rock for grazing and hiding places

About the Starry Blenny

Renowned for its abundance of personality, the Starry Blenny makes a fantastic addition to the marine aquarium. With an elongated body, comical bushy cirri above its large eyes, and a striking pattern of bright white stars against a dark, mottled background, it provides endless entertainment. They are fascinating to watch as they hop from rock to rock, propping themselves up on their pectoral fins to survey their surroundings and guard their chosen crevices.

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Where Starry Blenny comes from

Native range

Western Central Pacific

Countries / regions

Philippines, Indonesia, Australia

Habitat

Shallow coastal coral reefs and rocky rubble zones with abundant algae growth.

Widespread across the Indo-Australian Archipelago.

Similar species

Lawnmower Blenny
Salarias fasciatus
Tailspot Blenny
Ecsenius stigmatura
Bicolor Blenny
Ecsenius bicolor

We’re adding more full species guides as the catalogue grows.

Compatible tank mates

Reviewed guidance based on this species' recorded traits.

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Ocellaris Clownfish
Amphiprion ocellaris
Occupy entirely different swimming zones and diets, leading to a completely peaceful coexistence.
Great
Royal Gramma
Gramma loreto
A peaceful reef fish that ignores the blenny and requires similar water parameters.
Great
Coral Beauty Angelfish
Centropyge bispinosa
Both fish graze on live rock; in a smaller tank, they may compete for food and become territorial.
Compatible with caution
Lawnmower Blenny
Salarias fasciatus
Will display severe conspecific aggression towards other blennies with similar body shapes and dietary requirements.
Not recommended

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