One Spot Blenny
Crossosalarias macrospilus
Saltwater Fish
Species Group: Blenny
Family: Blenniidae
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Water parameters
Temp
76-80 F
Temperature
Maintaining a stable and appropriate temperature is critical for the survival of aquatic life.
pH 7.8 - 8.4 potential of HydrogenMeasuring the acidity or alkalinity of water on a 0–14 scale, where 7 is neutral, 7 is alkaline.
NO3 1-20 ppm NitrateWhile less toxic than ammonia, high nitrate levels (above 40–80 ppm) are important to monitor because they can cause fish stress, stunted growth, and harmful algae blooms.
NO2 <0.0001 ppm NitriteIt is a highly toxic, intermediate compound in the nitrogen cycle produced from broken-down ammonia
PO4 0.01 - 0.1 ppm PhosphateIt is essential for plant development but must be managed, as excess levels trigger nuisance algae blooms and inhibit coral calcification.
NH3 <0.1 ppm AmmoniaIt is the primary killer of aquarium fish, causing gill damage, stress, and death
Ca 380 - 450 ppm CalciumSupporting the growth, skeletal structure, and shell formation of corals, mollusks, crustaceans, and coralline algae
KH 8 - 12 dKH AlkalinityIt acts as a shield, neutralizing acids to prevent dangerous pH "crashes" that can harm fish, corals, and plants.
Mg 1200 - 1400 ppm MagnesiumIt enables coral growth by supporting skeletal formation, assists in metabolic processes, and ensures that calcium is available for corals, clams, and coralline algae.
SG 1.023 - 1.026 SG SalinityEssential for maintaining stable, natural water parameters, proper osmoregulation, and stress-free environments for marine fish and corals
ORP 250 - 400 mV Oxidation-Reduction PotentialA higher positive mV indicates clean, oxygen-rich water with high water quality, while low readings indicate high pollution.
About One Spot Blenny
General information
The One Spot Blenny is a peaceful species that is native to the Indo-Pacific region. They are typically small in size, reaching up to 4 inches (10 cm) in length. One Spot Blennies are known for their unique coloration, with a brownish-yellow body and a single black spot on their dorsal fin.
Diet & nutrition
In their natural habitat, One Spot Blennies feed on algae and small invertebrates. In an aquarium setting, they should be fed a varied diet of both meaty and vegetable-based foods, such as brine shrimp, mysis shrimp, and spirulina flakes.
Determining sex
Sexual dimorphism is not present in the One Spot Blenny, making it difficult to determine the sex of the fish.
Breeding & spawning
Breeding One Spot Blennies in an aquarium setting is rare and challenging, as they require very specific conditions to breed. They are not typically bred in captivity.
Diseases
One Spot Blennies are generally hardy and not susceptible to many common aquarium diseases. However, they are susceptible to parasitic infections, such as Ich.
Origination
The One Spot Blenny is native to the Indo-Pacific region, including the Red Sea, the Maldives, and the western Pacific Ocean.
Cautions
One Spot Blennies are generally not harmful to humans or other aquarium inhabitants. However, they may become aggressive towards other blennies or similarly shaped fish, so it is important to monitor their behavior in a community tank.
Acclimation process
When introducing a One Spot Blenny to a new aquarium, it is important to acclimate them slowly over the course of several hours to avoid stress and shock. This can be done by floating the bag containing the fish in the aquarium for 15-20 minutes and gradually adding small amounts of aquarium water to the bag over time.
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