Lyretail Dottyback (Pseudochromis Steenei) saltwater aquarium fish

Overview:

The Lyretail Dottyback (Pseudochromis fridmani) is a small, hardy marine fish known for its vivid purple coloration and active personality. Despite its size, it can be territorial, so it thrives in a stable, well-established saltwater aquarium with plenty of rockwork, hiding places, and broken lines of sight. A tank of at least 30 gallons is recommended, though larger systems provide better territory separation and reduce aggression. Provide moderate water movement, strong filtration, and excellent water quality with stable salinity, temperature, and pH. This species does best in reef-style setups with caves and crevices where it can retreat and establish a home area.

Diet and Feeding:

Lyretail Dottybacks are carnivores and should be offered a varied meaty diet. Feed high-quality marine pellets, frozen mysis shrimp, enriched brine shrimp, finely chopped seafood, and other small protein-rich foods. Variety helps prevent nutritional gaps and encourages strong coloration and long-term health. Feed small portions once or twice daily, only as much as the fish will consume quickly. Because dottybacks can be bold feeders, they may outcompete slower tankmates, so make sure all fish receive food. Occasional use of vitamin-soaked or enriched foods can be beneficial, especially during acclimation or recovery from stress.

Compatibility:

This species can be reef-safe with caution, but temperament matters more than size. Lyretail Dottybacks are generally compatible with peaceful to semi-aggressive tankmates that are not tiny enough to be bullied or eaten. Avoid housing them with very small fish, timid species, or similarly shaped dottybacks and highly territorial fish unless the aquarium is large and well-structured. They may harass gobies, firefish, tiny wrasses, and other shy species if space is limited. Suitable companions often include tangs, larger clownfish, anthias, dwarf angels, and robust wrasses in appropriately sized systems. Introducing the dottyback last can help reduce territorial behavior. A larger tank with many hiding places greatly improves compatibility and lowers the chance of persistent aggression.

Health and Quarantine:

Lyretail Dottybacks are generally hardy, but like all marine fish, they benefit from careful quarantine before entering the display tank. A 2–4 week quarantine period helps detect common issues such as marine ich, velvet, flukes, bacterial infections, and feeding refusal. Monitor breathing, appetite, body condition, and swimming behavior closely. Stress from poor water quality or aggression can weaken immunity, so keep ammonia and nitrite at zero and maintain consistent parameters. Provide a varied diet and avoid overfeeding, which can degrade water quality. Preventive care includes gradual acclimation, observation for injuries from tankmates, and prompt isolation if the fish becomes injured, hides constantly, or stops eating.

mysis shrimp brine shrimp marine flakes pellets
Lyretail Dottybacks are active, midwater-to-rockwork swimmers that spend much of their time darting in and out of crevices, so they do best in aquariums with plenty of hiding spots and a complex hardscape. They are typically semi-aggressive to territorial, especially toward conspecifics, and should usually be kept singly unless housed in a very large system with carefully managed space and structure. A minimum tank size of about 30 gallons is recommended, though larger tanks with ample live rock, caves, and visual barriers greatly reduce stress and territorial disputes. In well-structured layouts, they are more secure and less likely to harass tank mates, since broken sight lines help limit aggression. They generally coexist best with sturdy, reef-safe species and are usually compatible with corals, though very small shrimp or other tiny invertebrates may be at risk. Lyretail Dottybacks are carnivorous predators that feed primarily on small meaty foods such as mysis shrimp, finely chopped seafood, and quality frozen or pellet preparations, often hunting by picking prey from rockwork.

FAQ

Frequently Asked Questions

About the Lyretail Dottyback

  • How aggressive is a Lyretail Dottyback, and can it be kept with other small reef fish like clownfish, gobies, and firefish?
    Lyretail Dottybacks are moderately to highly aggressive for their size and can become territorial very quickly, especially in smaller aquariums. They are most likely to harass timid, slender-bodied fish such as firefish, small gobies, assessor basslets, and other dottybacks. Clownfish usually do better, but a Lyretail may still chase them if the tank is cramped or if it establishes a favorite cave. In general, they are best kept in tanks with plenty of rockwork, multiple hiding places, and tankmates that can hold their own. Avoid adding them to very peaceful community reef setups unless the aquarium is large and thoughtfully stocked.
  • Is a Lyretail Dottyback reef safe, or will it eat cleaner shrimp and other invertebrates?
    Lyretail Dottybacks are considered reef safe with caution. They do not usually bother corals, but they are opportunistic carnivores and may eat very small ornamental crustaceans. Peppermint shrimp, sexy shrimp, tiny cleaner shrimp, and newly molted shrimp are at risk, especially in smaller tanks or with a hungry individual. Larger cleaner shrimp and robust invertebrates are more likely to be left alone, but there is never a guarantee. If you want to keep one in a reef, assume that very small shrimp and delicate microcrustaceans may eventually become food.
  • What tank size and aquascape does a Lyretail Dottyback need to reduce aggression?
    A single Lyretail Dottyback can live in a tank as small as 30 gallons, but 40 gallons or larger is much better, especially if there are other fish. The key is not just volume but structure: lots of live rock, overhangs, caves, and broken sight lines. Lyretails claim a den and patrol a territory, so a reef with open swimming space plus multiple rock shelters helps spread out aggression. In bare or sparsely decorated tanks, they become far more pushy because every fish is always visible. If you want to keep more than one dottyback-related species, a much larger system with intense rockwork and careful introduction order is required.
  • What should I feed a Lyretail Dottyback, and why does mine ignore flakes or pellets?
    Lyretail Dottybacks are carnivores that do best on a meaty diet: frozen mysis shrimp, brine shrimp enriched with vitamins, chopped seafood, finely minced krill, and high-quality marine pellets designed for carnivores. Many specimens initially prefer live or frozen foods and may ignore flakes because they are natural ambush feeders that hunt small crustaceans and zooplankton in the wild. Most can be trained onto pellets by offering small portions multiple times daily and mixing pellets with their favorite frozen foods. Variety is important to maintain color, body condition, and breeding condition in adults.
  • Can a Lyretail Dottyback be kept with other dottybacks, pseudochromis, or similar-looking fish?
    This is usually a bad idea unless the system is large and carefully managed. Lyretail Dottybacks are territorial toward similar-shaped fish, and they often see other dottybacks, basslets, and pseudochromis as direct rivals. In smaller aquariums, fights can be constant and can lead to stress, hiding, torn fins, or death. If multiple pseudochromids are kept together, the tank must be spacious with extensive rock barriers and all fish should be introduced carefully, often at the same time. Even then, success is not guaranteed, so the safest approach is to keep only one Lyretail Dottyback per aquarium.