Saltwater Fish
Antennarius coccineus

Species Description…

Scientific Name: Antennarius coccineus
Common Name: Scarlet Frogfish
Species Group: Frogfish
Habitat: Reef Safe with Caution
Care Level: Advanced
Temperament: Predatory
Diet Type: Carnivore
Role in Aquarium: Predator
Max Fish Length: 6 (inches)
Min Aquarium Size: 30 (gallons)
Native Range: Indo-Pacific, including the Red Sea, Indonesia, and the Great Barrier Reef
Antennarius Coccineus - The Scarlet Frogfish

Antennarius Coccineus (The Scarlet Frogfish)

Overview

  • Native to the warm, shallow waters of the Indo-Pacific, including reefs, lagoons, and coastal rocky areas.
  • Recognized for its warty, textured skin that allows it to blend seamlessly with surrounding coral and rocks.
  • A skilled ambush predator that utilizes its specialized lure (illicium) to attract unsuspecting prey.
  • Highly valued among aquarists for its cryptic appearance and unique hunting behavior.

Feeding

  • Strictly carnivorous, preying on small fish, shrimp, and crustaceans.
  • Relies on live food initially but can be conditioned to accept frozen foods such as silversides or krill.
  • Due to its sedentary nature, it does not require frequent feeding, but portions should be appropriate to its size.
  • Overfeeding can lead to obesity and digestive complications, so feed sparingly and monitor intake.

Habitat

  • Typically found among coral rubble, sponge beds, and rocky outcroppings where it remains well-camouflaged.
  • Prefers calm waters with minimal current to allow it to remain still for long periods.
  • Aquariums should contain live rock formations, caves, and shaded areas to replicate its natural environment.
  • Due to its sedentary lifestyle, it does not require vast open swimming space but benefits from a well-structured tank.

Fish Care

  • Water temperature should be maintained between 74-80°F (23-27°C).
  • Requires a pH level of 8.1-8.4 and a salinity range of 1.020-1.025.
  • Highly sensitive to water quality fluctuations, making proper filtration and maintenance essential.
  • Regular monitoring of ammonia and nitrate levels is crucial to prevent toxicity buildup.
  • Minimal tank movement and a stress-free environment encourage healthy behavior and coloration.

Compatibility

  • Best kept as a solitary specimen or with other large, slow-moving fish.
  • Anything that fits in its mouth, including smaller fish and crustaceans, is considered prey.
  • Not recommended for reef tanks with small, delicate invertebrates or active tank mates.
  • Can coexist with other frogfish in large, well-structured aquariums but may exhibit cannibalistic tendencies.

Aquarium Behavior

  • A master of disguise, it remains motionless for extended periods, waiting for prey to come within striking distance.
  • Uses its elongated dorsal spine as a lure, waving it like a worm to entice potential meals.
  • Capable of rapid expansion of its mouth, swallowing prey whole in a fraction of a second.
  • Providing an environment rich in live rock and shadows helps maintain its natural behaviors and hunting efficiency.

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