Red Rooster Wasp saltwater aquarium fish

The Red Rooster Waspfish (Hypodytes rubripinnis) is a small venomous ambush predator in the family Tetrarogidae, distributed through the Indo-Pacific from Indonesia and the Philippines into Papua New Guinea. Coloration is highly variable and strongly cryptic, shifting through red, brown, orange, white, and mottled combinations depending on the individual. The most distinctive feature is the set of elaborate fin extensions over the head, which resemble a rooster's comb and give the species its trade name. Adults finish near 4 inches and spend most of the day motionless on the bottom, relying on camouflage rather than pursuit to secure a meal.

In nature this waspfish occupies coral reefs, rubble zones, and sandy bottoms at roughly 10 to 100 feet, and the aquarium should echo that structure. Plan on a 50-gallon system for a single adult, furnished with open rockwork that offers multiple perching ledges, a sandy or rubble substrate, and low to moderate flow. Lighting can be moderate to subdued. Mature, stable systems suit this fish best, and parameters should be held steady rather than allowed to swing. A secure lid matters, since a startled specimen may jump. Because of its predatory habits and demanding feeding, it belongs in a fish-only-with-live-rock display or a species-specific tank, and the combination of hunger strikes, stress sensitivity, and poor tolerance of medication places its care firmly in difficult territory.

Handle this species with care at every step. The spines are venomous, so netting, acclimation, and any aquascaping work near its perch should be done deliberately and with tools rather than hands.

This is a strict carnivore that feeds exclusively on live prey in the wild, waiting for fish and shrimp to drift within striking range. Freshly imported specimens generally accept nothing but live offerings such as ghost shrimp, grass shrimp, feeder fish, or mollies, and many individuals continue to require live food indefinitely. Transitioning an animal onto frozen items is possible but reported as extremely difficult, so anyone considering this fish should have a reliable supply of live feeders arranged before purchase.

Two to three feedings per week are sufficient once the fish has settled into a routine. Presenting prey directly in front of the mouth with a feeding stick works far better than expecting the waspfish to chase anything down. Remove uneaten live food promptly so it does not perish and foul the water. New arrivals commonly refuse food for extended periods, which makes careful observation of feeding behavior during quarantine one of the most important steps in establishing this species successfully.

Live Ghost Shrimp Live Grass Shrimp Feeder Fish Live Mollies
Activity levels are extremely low. A settled waspfish claims a favored perch and returns to the same spot day after day, moving little in between thanks to a slow metabolism. It does not school and is best kept as the only individual of its kind. Temperament is semi-aggressive in a strictly predatory sense: it does not chase or bully, but anything that fits in its mouth is treated as food. Keepers report that it stresses easily, goes off food readily, and reacts poorly to medication, so a quiet placement and minimal disturbance pay dividends.

Choose tankmates that are non-aggressive and at least six inches long, such as lionfish, larger groupers, and eels, which will neither harass the waspfish nor tempt it. Fish in the two- to four-inch range are risky, as they may be viewed as competition or as prey depending on the waspfish's own size, and anything under about two inches will likely disappear. This species is not reef safe. It largely ignores corals but can bruise or irritate them by settling on fronds, and it presents a direct threat to ornamental shrimp, small crabs, and other mobile invertebrates, which should be excluded entirely.

FAQ

Frequently Asked Questions

About the Red Rooster Wasp

  • Will a Red Rooster Waspfish accept frozen food, or is live prey required?
    Most specimens, particularly recent imports, take only live foods such as ghost shrimp, grass shrimp, or feeder fish. Weaning onto frozen items is possible but extremely difficult, and many individuals require live prey indefinitely.
  • Can this waspfish be kept in a reef aquarium?
    No, it is not reef safe. It usually ignores corals but may damage them by perching on fronds, and it will eat small fish, ornamental shrimp, and small crabs, so a fish-only-with-live-rock or species-specific system is the correct choice.
  • What tank size and tankmates suit an adult?
    Provide at least 50 gallons with rockwork for perching, a sandy or rubble substrate, and low to moderate flow. Tankmates should be non-aggressive and six inches or larger, such as lionfish, larger groupers, or eels.