Orange-spotted Blenny
Blenniella chrysospilos
The Orange-spotted Blenny is a charming, algae-grazing marine fish from the Indo-Pacific. It loves to perch on live rocks and needs a mature tank with plenty of crevices for shelter.
Wassertemperatur
22 - 27 °C
pH-Wert
8.1 - 8.4
Wassertyp
Meerwasser
Tankfüllstand
Unten und in der Mitte
Erwachsenengröße
13 cm
Mindesttankvolumen
>= 150 L
Mindestgruppe
>= 1
KH
8 - 12 dKH
Artbeschreibung
Geographical Origin and Habitat: Blenniella chrysospilos, commonly known as the orange-spotted blenny, is widely distributed across the tropical waters of the Indo-Pacific Ocean. Its natural range extends from the Red Sea and the eastern coast of Africa to the Society and Samoan Islands, ranging north to the Ryukyu Islands of Japan, and south to the Great Barrier Reef. It typically inhabits intertidal zones, shallow coastal rocky reefs, and tide pools at depths of 0 to 6 meters.
Taxonomy and Morphology: Belonging to the family Blenniidae and classified under the genus Blenniella. This small benthic fish reaches a maximum adult length of approximately 12 centimeters. It features an elongated, scale-less body covered with a protective mucous coat. Large, expressive eyes are located high on top of the head, and it is equipped with branched cirri (tentacles) above the eyes acting as sensory structures.
Social Behavior: A peaceful, bottom-dwelling species toward non-related fish, but highly territorial toward conspecifics or similar-looking blennies. It spends most of its time perched on live rock, using its pectoral fins to hold itself in place while scanning the surroundings. Males will defend their favorite crevices aggressively from rivals.
Coloration and Sexual Dimorphism: The body features a sandy-grey or light beige base color, covered in rows of bright orange or reddish-orange spots along the sides. Sexual dimorphism is present in mature adults: dominant males develop elongated anterior filaments on their dorsal fin and may show temporary darkening of the body color during spawning.
Pflege, Zucht und Mitbewohner
Aquarium Setup: Requires a minimum tank volume of 100 liters for a single specimen. The aquarium must be decorated with plenty of mature live rock arranged to create overhangs, shelves, and crevices for perching and shelter. A sandy substrate is preferred. A secure, tight-fitting lid is mandatory, as this species is notorious for jumping out when startled.
Diet and Feeding: Herbivorous. In the wild, it feeds by scraping microalgae and detritus from rock surfaces. In captivity, it is an excellent control agent for nuisance green algae. Supplement their diet with high-quality spirulina-based flakes, pellets, dried nori seaweed, and herbivore preparations. Occasional feedings of frozen brine shrimp can be offered.
Water Quality: Demands standard marine water conditions: temperature of 23-28 °C, pH of 8.1-8.4, specific gravity of 1.020-1.025, and a dKH of 8-12. High oxygen levels and moderate water movement are highly beneficial to mimic their shallow intertidal habitats. Perform regular partial water changes to maintain water quality.
Compatibility and Cohabitation: Completely reef-safe and does not bother corals, clams, or decorative invertebrates. Excellent addition to peaceful community reef tanks. Ideal tankmates include clownfish, firefish, wrasses, and small tangs. Keep only one blenny per aquarium unless they are a mated pair housed in a large tank.
Aquarium Breeding: Oviparous. During spawning, the female deposits adhesive eggs in a small crevice or empty shell. The male fertilizes the clutch and assumes sole responsibility for guarding and aerating the nest. The eggs hatch into planktonic larvae, which are extremely difficult to raise in home aquariums due to feeding challenges.
Risks and Diseases: The primary risk is starvation if introduced into a new, sterile aquarium lacking natural algae film, or if it refuses prepared herbivore foods. Ensure the tank is mature before introduction. A secure lid is essential, as they are prone to leaping out of uncovered aquariums if they feel threatened.
Geografische Herkunft und Verbreitung
Blenniella chrysospilos, commonly known as the orange-spotted blenny, is widely distributed across the tropical waters of the Indo-Pacific Ocean. Its natural range extends from the Red Sea and the eastern coast of Africa to the Society and Samoan Islands, ranging north to the Ryukyu Islands of Japan, and south to the Great Barrier Reef. It typically inhabits intertidal zones, shallow coastal rocky reefs, and tide pools at depths of 0 to 6 meters.
Ursprung
Tropische Ozeane und RiffeAfrika und MadagaskarOstasien
Fischprofil
- Temperament
- Semi-aggressive
- The red-spotted blenny is generally a peaceful and curious inhabitant that ignores most other community fish. However, they are highly territorial and aggressive toward other blennies or similarly shaped bottom-dwellers that share their feeding niche. They will vigorously defend their chosen shelter or grazing territory from perceived competitors. Overall, they display an entertaining personality, often watching their owner and exhibiting charming perching behaviors.
- Diät
- Herbivore
- Blenniella chrysospilos is primarily an herbivorous algae grazer, depending heavily on microalgae growing on live rock. Their aquarium must be well-established with a healthy growth of natural algae to sustain them long-term. If natural algae is scarce, their diet should be supplemented daily with high-quality spirulina, nori, and vegetable-based flakes or pellets. While they may occasionally sample meaty foods, these should not form the core of their diet.
- Lebenserwartung
- 2-5 years
- Erwachsenengröße
- 13 cm
- Geschlechterverhältnis
- 1:1 ratio
- In the wild, Blenniella chrysospilos is often observed living in mated pairs, but in the aquarium, they can be highly territorial toward conspecifics. It is generally recommended to keep them singly unless a confirmed male-female pair can be introduced simultaneously in a large tank. In smaller setups, keeping multiple individuals of this species will lead to aggressive turf wars. Providing ample territory and visual barriers is crucial if attempting to house more than one specimen.
- Fütterungsfrequenz
- Twice daily
- These blennies are continuous grazers that feed throughout the day by scraping algae off the rocks. In an aquarium with abundant natural algae growth, supplementary feeding can be limited to once or twice a day. If the tank is clean and lacks sufficient natural algae, they should be offered seaweed or algae sheets multiple times a day to prevent starvation. Regular grazing keeps them active and prevents them from nipping at corals out of hunger.
- Bioload
- Low to Medium
- Blenniella chrysospilos has a low to moderate biological load due to its small size and primarily herbivorous diet. However, because they graze constantly on microalgae, they produce a steady amount of organic waste that requires adequate mechanical and biological filtration. A well-established aquarium with a protein skimmer and regular water changes will easily manage their waste. Maintaining pristine water quality is highly beneficial to support their overall health and prevent stress.
- Fluss
- Strong
- Coming from shallow reefs, reef flats, and surge-swept areas, Blenniella chrysospilos prefers moderate to strong water flow. Good circulation helps mimic their natural intertidal habitat and keeps the water highly oxygenated, which is beneficial for their metabolism. However, they also require areas of lower flow within their rock dens to rest without fighting the current. A dynamic flow pattern with strong powerheads and quiet resting spots is ideal.
- Sprungrisiko
- Yes
- Blenniella chrysospilos is known as a rockskipper, which reflects its natural ability and instinct to jump out of the water. In the wild, they skip between tide pools, and in captivity, they will easily leap out of an open aquarium if spooked or stressed. Therefore, a secure, tight-fitting lid or a tight mesh screen cover is absolutely mandatory for their enclosure. Even small gaps around cords and pipes should be covered to prevent accidental escapes.
- Reproduktion
- Oviparous
- Blenniella chrysospilos is an oviparous species that lays demersal, adhesive eggs, typically inside a male's chosen cave or crevice. During spawning, the male courts the female, and once eggs are deposited, he takes on the role of guarding and fanning the nest. The eggs are attached to the substrate and protected until they hatch into planktonic larvae. Breeding in the home aquarium is rarely achieved, and raising the tiny, planktonic fry is extremely difficult for hobbyists.
- Kompatibilität & Tankkameraden
- Reef safe
- This blenny is highly compatible with a wide range of peaceful reef fish, such as clownfish, gobies, and small wrasses. They should not be housed with aggressive predators or other herbivorous blennies unless the aquarium is exceptionally large. While generally reef-safe, hungry individuals may occasionally nip at large-polyp stony (LPS) corals or clam mantles. Providing a well-fed environment will minimize the risk of damage to corals and invertebrates.
- Tankfüllstand
- Middle/Bottom
- This species is a bottom-to-middle dweller, spending the majority of its time perching on live rock or hiding in crevices. They use their specialized pectoral fins to prop themselves up on rocks, substrates, and corals to observe their surroundings. While they occasionally swim into the water column to catch food or move between rock formations, they rarely venture near the surface. Providing plenty of rockwork at various heights will allow them to utilize the lower and middle zones of the aquarium effectively.
Wissenschaftliche Modelle & Parameter
FishBase
Zugang zu den offiziellen wissenschaftlichen Daten der Art
FishBase v25.04Daten synchronisiert am: 15.06.2026
- Trophäenniveau
- 2,5 ± 0,19 se
- Belastbarkeit
- Hoch (weniger als 15 Monate)
- Phylogenetische Einzigartigkeit (PD50)
- 0.502
- Bayessche Längen-Gewichts-Beziehung
- a = 0.00776, b = 3
- AnfälligkeitGeringe Anfälligkeit (10 / 100)
Verwandte Arten
Empfehlungen gruppiert nach nahen Verwandten, Auswahl von Begleitern und ähnlicher Betreuung.
