Melanurus Wrasse (Halichoeres Melanurus)

The Melanurus Wrasse is an active, vibrant marine fish renowned for its brilliant color pattern and natural pest-control abilities. Males showcase a vivid blue-green body lined with radiant orange and yellow stripes, while both juveniles and adults provide constant, engaging movement across daytime reef environments.

As an active micropredator, this species actively helps maintain a clean aquarium by hunting nuisance pests such as flatworms, pyramidellid snails, and small bristle worms. It requires a fine sand substrate for burrowing at night and thrives when provided with varied, high-quality meaty foods.

Key Features

Highlights

• Scientific Name: Halichoeres melanurus
• Primary Common Name: Melanurus Wrasse
• Other Common Names: Tail-spot Wrasse, Hoeven's Wrasse, Pinstripe Wrasse
• Origin: Western Pacific (Japan to Great Barrier Reef and Samoa)
• Max Size: 4.5–6 inches (11–15 cm)
• Temperament: Peaceful / Active (Caution with other wrasses)
• Diet: Carnivore (Micropredator - Needs multiple daily feedings)
• Minimum Tank Size: 55+ Gallons
• Reef Compatibility: With Caution (Great for pest control; may eat small inverts)

Materials & care

Diet & Compatibility:

• Diet: This is an active Carnivore/Micropredator with a high metabolism. It requires multiple small feedings (2-3 times) per day of varied, meaty foods, including enriched frozen preparations like mysis shrimp, brine shrimp, copepods, and high-quality pellets. Its constant foraging habit means it hunts micro-invertebrates throughout the day.
• Pest Control: The Melanurus Wrasse is known for its natural predatory skills against aquarium pests. It is a known consumer of nuisance organisms such as Planaria flatworms, Pyramidellid snails (which parasitize Tridacna clams), and small bristle worms.
• Substrate Requirement: A minimum of a 2–3 inch deep bed of fine, soft sand is mandatory. This fish is a dedicated sand-burrower, diving into the sand to sleep at night or when startled. Without this, the wrasse can become highly stressed or sustain injuries.
• Reef Compatibility: It is generally considered Reef Safe With Caution. It will not harm corals but will hunt and consume tiny ornamental invertebrates like small snails, hermit crabs, and perhaps the smallest ornamental shrimp. Larger shrimp (e.g., Cleaner Shrimp) are generally safe.
• Temperament: It is Peaceful toward most tankmates. However, it can be aggressive toward its own species or other similar-looking Halichoeres wrasses. It is generally best kept singly. Avoid pairing it with very small, timid, or slow-moving fish that may be stressed by its high energy level.
• Tank Environment: A tight-fitting lid is essential, as this wrasse, like all Halichoeres species, is a notorious jumper.

Compatibility

Peaceful toward most tankmates, but best kept singly as it can show aggression toward other Halichoeres wrasses. Avoid housing with very small, timid fish or tiny ornamental invertebrates.

Important Fulfillment Information

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