Red Spotted Dottyback (Pholidochromis Cerasina) saltwater aquarium fish portrait

Pholidochromis cerasina is a small, reef-associated dottyback from the Western Pacific, recorded from Indonesia, including Sulawesi, and the Philippines. The body is short and compressed. Spotted individuals show a silver, cream-yellow, or white ground color broken by cherry-red, orange, or pink-orange spots that align into interrupted lines across the rear body and fins, while plainer gray-white or pink-silver individuals also occur. This difference reflects marked sexual dimorphism, though aquarium references disagree about which pattern belongs to which sex. The original description separates it from Pholidochromis marginata by the lack of dark submarginal markings on the median fins and by the prominent dark spots ringing the head sensory pores. Reported adult measurements vary in the literature, from roughly two inches to a little over three inches, and an adult size near four inches is the working figure for housing decisions.

Adults should be housed in an aquarium of at least 30 gallons, though larger volumes make territory management far simpler. Build the layout around abundant rockwork riddled with cracks, caves, crevices, and overhangs, and use that structure to create visual barriers. This is a cover-oriented fish that spends much of its time near shelter, and it settles fastest when it can claim a defensible hideaway immediately after introduction. A tight-fitting cover or fully closed lid is not optional, as this species is an accomplished jumper and will find any open gap in the canopy or overflow area.

The natural diet of this species has not been documented in detail, but it is a carnivore and should be fed accordingly. In the aquarium, build the menu around mysis shrimp, enriched brine shrimp, plankton, finely shaved krill, and chopped mussel, cockle, and clam, along with other appropriately sized meaty marine items. Frozen preparations are the most reliable staple, and some individuals will also take marine flakes or pellets once they are comfortable.

Offer small portions several times each day rather than one heavy meal, which suits a fish that forages in short trips from cover. Newly introduced specimens are often secretive and retiring for the first days in a new system, yet accounts from those who described the species report that they begin taking offered foods before long. Target-feeding near the rockwork during this settling period encourages a faster transition to prepared items.

Mysis Shrimp Enriched Brine Shrimp Plankton Shaved Krill Chopped Mussel Cockle Clam Marine Pellets
This dottyback pairs shy, shelter-seeking habits with genuine territorial aggression. It typically remains close to the rockwork and may hide for a time after introduction, but once established it will defend its chosen zone and harass fish that wander into it. Descriptions of severity vary from fairly feisty to outright aggressive, so plan the community around the stronger interpretation. Keep a single specimen in anything but a very spacious aquarium; multiples should only be attempted in a large system with strong visual barriers, using same-sized individuals introduced at the same time.

Choose tankmates that are larger or similarly assertive and unlikely to be bullied. Placid dartfish, firefish, small gobies, grammas, and small wrasses are poor choices and are best left out of the stocking plan. Corals are not a concern, and the species is not considered a threat to sessile reef invertebrates, but it is not fully reef safe: small ornamental shrimp, tubeworms, polychaetes, bristleworms, and other small benthic crustaceans are all at risk. Reef keepers who prize a delicate cleanup crew or breeding shrimp should weigh that trade-off carefully.

FAQ

Frequently Asked Questions

About the Red Spotted Dottyback

  • Is the Red Spotted Dottyback safe for a reef aquarium?
    It does not threaten corals, but it is not fully reef safe because it preys on small ornamental shrimp, tubeworms, polychaete worms, and other small benthic crustaceans. Reef keepers with delicate invertebrates should stock it with that risk in mind.
  • Which tankmates work best with this species?
    Pick larger, robust, moderately assertive fish that will not be pushed around, and avoid placid dartfish, firefish, small gobies, grammas, and small wrasses. Keep only one specimen unless the aquarium is spacious and heavily divided by rockwork, with same-sized fish introduced together.
  • What should I verify before buying one?
    Confirm the fish is identified as Pholidochromis cerasina, which is also traded as Cherry Dottyback or Red Spotted Pygmy Basslet, and ask whether it is already eating prepared meaty foods. Note whether it shows the spotted or plain color form, since coloration is sexually dimorphic and sex assignment is disputed.