SeafanEmergencies

Wrasses

Six line wrasse

Pseudocheilinus hexataenia

Also sold as Sixstripe wrasse, Pyjama wrasse

Six line wrasse (Pseudocheilinus hexataenia), photographed in the sea or an aquarium
Photo: Brian Gratwicke, CC BY 2.0, via Wikimedia Commons
Care level
Beginner
Adult size
7.6 cm in aquariums
Minimum tank
114 litres
Temperament
Semi-aggressive
With corals
Reef safe
Captive-bred
Wild-caught (captive-bred rare)
IUCN status
Least Concern
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How do you care for the six line wrasse?

Semi-aggressive; can bully peaceful wrasses and timid fish.

Feeding

Carnivore.

May need live food to start.

Tank and special needs

Plan for at least 114 litres of water (the care sheet says 30 US gallons). FishBase records wild fish up to 10 cm (total length); aquarium fish usually stay nearer 7.6 cm.

Rockwork; lid.

Why this care level

Hardy, but often becomes a bully; add late.

Corals and invertebrates

Small crustaceans; good pest predator.

Which tankmates suit the six line wrasse?

Avoid with fairy and flasher wrasses, firefish and dartfish in small tanks.

Suggested order in a mixed tank: add last, after the peaceful fish have settled.

More than one six line wrasse

Keep one six line wrasse: two of the same species usually fight.

Other fish

Checked against the other 59 fish in this guide, assuming a tank big enough for both. Individual fish differ, so treat this as a starting point.

Take care (9)

  • Rainford's gobyBoth eat copepods from the rock; a tank under about 400 litres rarely grows enough for two.
  • Red head solon fairy wrasseSix line wrasses often bully peaceful wrasses, firefish and dartfish, especially in small tanks.
  • Carpenter's flasher wrasseSix line wrasses often bully peaceful wrasses, firefish and dartfish, especially in small tanks.
  • Leopard wrasseBoth eat copepods from the rock; a tank under about 400 litres rarely grows enough for two.
  • FirefishSix line wrasses often bully peaceful wrasses, firefish and dartfish, especially in small tanks.
  • Purple firefishSix line wrasses often bully peaceful wrasses, firefish and dartfish, especially in small tanks.
  • Scissortail dartfishSix line wrasses often bully peaceful wrasses, firefish and dartfish, especially in small tanks.
  • Mandarin dragonetBoth eat copepods from the rock; a tank under about 400 litres rarely grows enough for two.
  • Spotted mandarinBoth eat copepods from the rock; a tank under about 400 litres rarely grows enough for two.
Usually fine together (50)

Invertebrates

Only the invertebrates with a known risk are listed.

Avoid together (1)

Take care (6)

  • Skunk cleaner shrimpSix line wrasse may eat very small shrimp; adult skunk cleaner shrimps are usually safe.
  • Peppermint shrimpSix line wrasse may eat very small shrimp; adult peppermint shrimps are usually safe.
  • Camel shrimpSix line wrasse may eat very small shrimp; adult camel shrimps are usually safe.
  • Tiger tail sea cucumberA stressed or dead tiger tail sea cucumber can release toxins that harm fish; cover pump intakes.
  • Sea appleA stressed or dead sea apple can release toxins that harm fish; cover pump intakes.
  • Harlequin shrimpSix line wrasse may eat very small shrimp; adult harlequin shrimps are usually safe.

Corals and anemones

Only the corals and anemones with a known risk are listed.

Take care (1)

These checks follow the reasons fish and invertebrates clash: same species or genus, similar shape, mouth size, temperament, food, burrows, tank size and the order they are added. Individual animals differ; every source agrees on that.

Quarantine and health

Standard.

New fish are the most common way disease gets into a reef tank. Quarantine every fish in a separate tank before it joins the display, and choose a method that suits its tolerance of copper.

Captive-bred or wild?

Wild-caught.

Where sources disagree

Where sources disagree
TopicWhat sources sayOur reading
Minimum tank
  • One US retailer page gives 60 US gallons in its quick stats.
  • The same page gives 30 US gallons in its overview.
The size is fine at 30 US gallons (about 114 litres). The real limit is its aggression towards peaceful wrasses.

Other minimum tank sizes we found:

  • The same page's quick stats say 60 gal while its overview says 30 gal.

What does it cost in the UK?

about £29. This is one UK retailer’s listing on 21 October 2026, not a market average, and every item was sold out on that day.

Sources

  1. LiveAquaria (US retailer) care sheetRead 21 October 2026, read in full. Used for: stats, tank conflict.
  2. FishBase species summaryRead 21 October 2026, read in full. Used for: max length, IUCN.
  3. Kraken Corals (UK retailer) catalogueRead 21 October 2026, read in full. Used for: UK price.

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