Ring-Eyed Dottyback (Pseudoplesiops typus) guide: Learn about tank requirements, carnivorous diet, and the shy behavior of this rare Western Pacific reef fish.
The Ring-Eyed Dottyback, scientifically known as Pseudoplesiops typus, is a captivating and somewhat enigmatic member of the Pseudochromidae family. Native to the hidden crevices of the Western Pacific—spanning the Philippines, Indonesia, the Solomon Islands, and northern Australia—this species is prized by collectors for its subtle elegance and small stature. Unlike some of its more aggressive cousins in the dottyback family, the Ring-Eyed Dottyback is a cryptic species, often found darting between coral branches and rocky fissures at depths of up to 30 meters. Its most defining feature is the distinct, pale ring surrounding its eye, which gives it an alert and inquisitive appearance.
To provide a thriving environment for the Ring-Eyed Dottyback, a minimum tank size of 75 liters (20 gallons) is required for a single specimen. If you plan to house a pair, a volume of 115–150 liters is recommended to allow for adequate territorial separation. The aquascape is the most critical factor; it must be rich in live rock with numerous caves, shaded overhangs, and small “bolt holes” where the fish can retreat when startled. Water parameters should be kept stable: temperature at 22–26°C (72–78°F), pH between 8.1–8.4, and salinity at 1.023–1.025 sg. A tight-fitting lid or screen cover is mandatory, as this species is a proficient jumper, especially during the acclimation phase or if chased by tank mates.
As a dedicated carnivore, Pseudoplesiops typus thrives on a protein-rich diet. In the wild, they hunt small crustaceans, zooplankton, and various micro-invertebrates living within the reef matrix. In the home aquarium, they should be offered a variety of meaty foods such as frozen mysis shrimp, vitamin-enriched brine shrimp, and finely chopped seafood. High-quality marine pellets and flakes are usually accepted once the fish is settled. To maintain the intensity of their coloration, it is beneficial to supplement their diet with foods containing carotenoids and spirulina. Feeding once or twice daily is sufficient, but ensure the food reaches the lower levels of the tank where this shy hunter spends most of its time.
While most dottybacks are notorious for their feisty temperament, the Ring-Eyed Dottyback is relatively mild, though it still retains a degree of territoriality. It is best kept as a single specimen unless introduced as a known mated pair in a larger system. It is generally peaceful toward corals and larger invertebrates, making it an excellent candidate for reef tanks. However, it may view very small ornamental shrimp as potential prey. Ideal tank mates include peaceful gobies, blennies, and larger wrasses. Avoid housing them with highly aggressive fish or other dottybacks to prevent territorial disputes.
The breeding habits of Pseudoplesiops typus in the wild involve the male guarding a cluster of eggs hidden deep within a rocky crevice. The male is responsible for fanning the eggs to provide oxygen and defending the nest from intruders until they hatch. While breeding in captivity is theoretically possible and has been observed in related dottyback species, there are no widespread records of successful commercial-scale production for the Ring-Eyed Dottyback. Success would require a dedicated breeding system with low light, minimal stress, and a steady supply of specialized planktonic food (rotifers) for the larvae.
The Ring-Eyed Dottyback is a hardy species that adapts well to aquarium life once it moves past the initial stress of transport. However, it remains susceptible to common marine ailments such as Marine Ich (Cryptocaryon irritans) and bacterial infections if water quality is poor. A quarantine period of 2–4 weeks is highly recommended for all new arrivals. Maintaining high oxygen levels and avoiding sudden shifts in temperature or salinity are the best preventative measures. With proper care and a stress-free environment, these charming fish can live for 4 to 6 years in captivity.
Cover Photo Credit: Randall, John E.
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