Secretive Wrasse

Secretive Wrasse

The Secretive Wrasse (Pseudocheilinus evanidus), also sold as the pinstripe or striated wrasse, is a compact Indo-Pacific rock worker: rich red-orange with fine white pinstripes and a pale cheek mark. The common name is accurate — it vanishes into rubble at the first shadow — but settled adults are tough, long-lived and useful hunters of tiny pest invertebrates, in the same niche as the six-line / pyjama wrasse (Pseudocheilinus hexataenia) and the mystery wrasse (Pseudocheilinus ocellatus).

Plan for shyness at first and feistiness later. People buy “a helpful little reef wrasse” and discover a semi-aggressive crevice specialist that may decide tiny shrimp and other small wrasses share its job description.

Frontmatter behaviour is Solitary — one small Pseudocheilinus of this niche per typical tank. Larger systems with dense broken sightlines sometimes hold more; the 75-litre minimum does not.

Natural Habitat & Origin

Pseudocheilinus evanidus ranges across much of the Indo-Pacific on coral reefs and rubble where it can dive into branches and holes. It stays glued to structure, darting out for tiny crustaceans and other small invertebrates, then disappearing again. You will not see it schooling in blue water like anthias or chromis.

In the aquarium that means abundant live rock with tight holes, overhangs and interrupted sightlines — not a sparse island scape. A mature system with natural microfauna eases the jump from wild hunting to prepared foods and gives the fish something to do between meals. Depth on the reef varies; complexity of cover matters more in glass than matching a particular metre mark.

Care Requirements

Salinity about 1.024–1.026, pH 8.1–8.4, temperature 24–26°C (75–79°F), with zero ammonia and nitrite. Adults reach about 10 cm (4 inches). Frontmatter minimum is around 75 litres (about 20 US gallons) with heavy rockwork — enough for one fish, not a licence to add a second small wrasse or a colony of delicate sexy shrimp and blame “bad luck” when conflict starts. Longer footprints help more than tall ones.

A gap-free lid is essential. Like other Pseudocheilinus, this species jumps. Add it later in the stocking order when possible so peaceful residents already own territory; “first wrasse in the rock stack” often defines the whole aquascape as private property.

Quarantine still pays. Hardy reef wrasses arrive with the same marine ich and velvet risks as everything else that crossed an airport. Use a quarantine protocol before display. Track salinity and temperature in the Aquarium Tracker if you want drift visible before the fish vanishes into rock for days.

Diet & Feeding

Carnivore focused on small invertebrates. Wild fish take tiny crustaceans; keepers value the species for small bristleworms and other micro-pests, with the same caveat as sixlines — pest control is a bonus, not a contract. Some individuals ignore the flatworm you bought them for and still investigate ornamental shrimp.

Feed frozen mysis, enriched brine, finely chopped seafood, copepod-style foods and quality small marine pellets once or twice daily. A secretive wrasse that only gets what it hunts in a polished SPS tank can thin out once easy prey is gone. Watch condition behind the pectorals, not just activity — these fish stay busy while quietly losing weight.

Behavior & Temperament

Semi-aggressive: shy and cover-bound at first, assertive once established, especially toward other small wrasses and similarly sized fish competing for the same holes. Best as the only small wrasse in most tanks. Daytime behaviour is continuous rock inspection; overnight it sleeps in crevices. It does not need a sand bed to bury in the way some Halichoeres do, though sand is fine for the rest of the system.

Flashing or chasing at lights-out often means a neighbour is sharing a preferred hole — add rock complexity before you reach for medications. Persistent glass hovering after weeks usually means insufficient cover or a bullying tankmate, not a fish that “never settles.”

Tank Mates

Works with a wide reef community: clownfish, gobies, blennies, anthias, chromis, larger dissimilar wrasses, and tangs in tanks sized for the tang. Avoid other Pseudocheilinus and most similarly sized fairy or flasher wrasses in anything near the 75 L minimum. Be cautious with expensive ornamental shrimp — many pinstripes ignore adult cleaner shrimp and still pick off smaller species or juveniles.

Corals are generally left alone; this is among the more coral-safe wrasses. The reef risk is microfauna and tiny ornamental crustaceans. If the clean-up crew is the point of the tank, accept that “reef-safe” here means coral-safe more than shrimp-safe, or use pest controls you can remove.

Breeding

Pelagic spawner with no practical home rearing. Sex-change dynamics exist in many wrasses; for the average keeper the relevant fact is simpler: trade fish are wild-collected, and you are buying a pest-hunting rock worker, not a breeding-pair project.

Common Health Issues

Hardy when covered, fed and quarantined; still liable to ich and velvet after shipping, and to jump deaths recorded as disappearances. Secure the lid before you diagnose disease. Thinness after the rock is picked clean is husbandry — increase feed frequency and enrichment.

Give it dense rock, a sealed top, varied meaty foods, time to come out of hiding, and no competing small wrasse. Then the Secretive Wrasse is a hardy, useful, characterful reef fish for intermediate keepers who accept a feisty streak. Ignore the feisty part and it becomes the red streak that rearranged your shrimp collection.