Yellowstriped fairy basslet (Pseudanthias tuka) - Marine Aquarium Livestock UK

Overview

The Yellowstriped Fairy Basslet, Pseudanthias tuka, is a beautiful and highly active marine fish prized for its vivid colouration and elegant swimming style. Also known simply as the Tuka Anthias, this species brings constant motion and a natural shoaling presence to the upper and middle levels of a reef aquarium. The medium size offered here is suitable for established marine systems where water quality is stable and feeding can be managed carefully.

Like many anthias, Pseudanthias tuka is best kept in a peaceful reef environment with plenty of open swimming space and regular small feedings throughout the day. It is a species that rewards attentive care with stunning colour and fascinating social behaviour. For aquarists looking to create a lively reef display, this is an exceptional choice.

At Tropical Fish Co, all livestock is selected with care and shipped with a live arrival guarantee and fast UK delivery, helping your new fish arrive in the best possible condition.

Care at a Glance

Origin & Natural Habitat

Pseudanthias tuka is native to the Indo-Pacific region, where it inhabits outer reef slopes, drop-offs, and current-swept coral zones. In the wild, these fish often gather in loose groups above the reef, feeding on tiny drifting plankton carried by the water movement. Their natural environment is bright, oxygen-rich, and full of constant flow, which is why they thrive best in aquariums that replicate those conditions.

Unlike hardier reef fish that adapt to a wide range of conditions, the Yellowstriped Fairy Basslet prefers stable, mature marine systems with excellent filtration and consistent water chemistry. This species is not suited to newly set-up tanks and does best where live rock, open swimming areas, and calm tank mates are already established.

Tank Setup & Water Parameters

A well-designed reef aquarium for Pseudanthias tuka should prioritise swimming space, water movement, and low stress. A larger tank is strongly recommended because anthias are active and social, and they do best in groups. Provide plenty of live rock for security and natural grazing points, but avoid overcrowding the tank with too much decor. Open water is just as important as shelter.

Strong, varied flow helps simulate reef currents and keeps oxygen levels high. Efficient protein skimming, regular water changes, and careful nutrient control are essential because anthias are sensitive to poor water quality. Keep ammonia and nitrite at zero, and aim for very low nitrate levels. Stable salinity is also important, especially in reef systems with corals and other invertebrates.

Recommended parameters:

• Temperature: 23–27°C
• pH: 8.1–8.4
• Salinity: 1.023–1.026 specific gravity
• Minimum tank size: 250 litres, with larger systems preferred for groups

Because this species is a frequent feeder, an automatic feeder or a consistent feeding routine can be very helpful. A mature reef aquarium with a secure lid is also recommended, as anthias can jump when startled.

Feeding Guide

Pseudanthias tuka is a planktivorous carnivore that naturally feeds on tiny zooplankton in the water column. In captivity, it should be offered a varied diet of small, nutrient-rich marine foods. Excellent options include enriched mysis shrimp, copepods, finely chopped krill, marine plankton preparations, and high-quality anthias pellets or micro pellets.

To keep this fish in top condition, feed small amounts two to four times per day. Anthias have fast metabolisms and can lose condition if fed only once daily or if food is too large to eat comfortably. Soaking frozen foods in vitamin supplements and marine HUFA enrichments can support colour, immunity, and long-term health.

As with all marine fish, avoid overfeeding. Offer only what is consumed quickly, and remove any uneaten food to protect water quality. A varied feeding regime is one of the keys to success with this species.

Tank Mates / Compatibility

The Yellowstriped Fairy Basslet is peaceful and best kept with other non-aggressive marine species. Suitable tank mates include calm reef fish such as clownfish, gobies, blennies, firefish, chromis, cardinals, and other gentle anthias in appropriately sized systems. It also does well in reef aquariums with corals and most ornamental invertebrates, provided the tank is mature and stable.

Avoid housing this species with aggressive, territorial, or boisterous fish that may outcompete it at feeding time or cause stress. Large wrasses, triggerfish, puffers, dottybacks, and dominant damsels are generally poor choices. Very assertive tank mates can intimidate anthias and lead to reduced feeding, hiding, or premature decline.

For best results, keep Pseudanthias tuka in a small group or harem-style setup in a suitably sized aquarium. This helps spread aggression and encourages natural behaviour. Introduce them to the tank before more assertive species whenever possible.

Why Buy from Tropical Fish Co

When you order from Tropical Fish Co, you are choosing a specialist UK aquatic retailer that understands the needs of delicate marine livestock. We focus on healthy, well-conditioned fish and careful packing to help ensure a smooth transition into your aquarium. Our live arrival guarantee gives you added confidence, while fast UK delivery helps reduce transit stress and get your fish settled sooner.

We know that anthias are not a casual purchase, which is why we aim to provide clear care information and reliable service for every order. Whether you are building a reef display or adding movement and colour to an established marine tank, the Yellowstriped Fairy Basslet is a standout species that can become a true centrepiece with the right care.

If you are ready for a rewarding reef fish with exceptional colour and graceful behaviour, Pseudanthias tuka is an outstanding choice.