Ruby Scat Care Guide
Scatophagus argus (Var) · Freshwater Fish
What Ruby Scat look like
The Ruby Scat (Scatophagus argus var) exhibits a distinctive morphology characterized by its laterally compressed, disc-like body which can reach a maximum adult size of 15-30 cm. This species displays sexual dimorphism, with males typically being slightly larger and exhibiting more pronounced coloration during breeding seasons. The body is adorned with a striking pattern of large, dark black leopard spots against a vivid red background, providing both camouflage and a warning coloration. The dorsal fin is elongated and sail-like, while the anal fin is similarly extended, both contributing to its unique silhouette. The Ruby Scat possesses a well-developed lateral line system that aids in detecting vibrations in the water, and its dentition is adapted for an omnivorous diet, featuring flat, grinding teeth suitable for processing both plant material and small invertebrates. Defensive adaptations include the ability to rapidly change color and the presence of a robust body that can withstand predation attempts.
Behavior & temperament
Ruby Scats are typically found in brackish waters and exhibit a social structure that leans towards a loose schooling behavior, although they can also be observed as solitary individuals. They inhabit the mid to lower regions of the water column, often dwelling near the substrate where they forage for food. Breeding behavior involves egg scattering, with females releasing eggs into the water column, where fertilization occurs externally. Ruby Scats are generally peaceful but can display territorial aggression during breeding or when establishing dominance within a group, particularly in confined spaces.
Diet & feeding
In the wild, Ruby Scats are omnivorous, feeding on a varied diet that includes algae, detritus, and small invertebrates. In captivity, they require a balanced diet that includes high-quality pellets, frozen or live foods such as brine shrimp and bloodworms, along with plant matter to meet their nutritional needs.
Behind the name
Scatophagus (scatophagous; dung-eating) derives from the Greek 'skato' (dung) and 'phagein' (to eat), while 'argus' refers to the spotted pattern resembling the mythical Argus Panoptes, a creature with many eyes.
Plan your tank
Check the numbers before you buy: tank volume, a stocking plan, cycle progress, water changes, and your ongoing care routine.
Keeping Ruby Scat?
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