Saltwater Fish
Pterois mombasae
Pterois mombasae - Mombasa Lionfish

Pterois mombasae (Mombasa Lionfish)

Species Description…

Scientific Name: Pterois mombasae
Common Name: Mombasa Lionfish
Species Group: Lionfish
Habitat: Reef Safe with Caution
Care Level: Intermediate
Temperament: Predatory
Diet Type: Carnivore
Role in Aquarium: Predator
Max Fish Length: 7 (inches)
Min Aquarium Size: 75 (gallons)
Native Range: Indo-Pacific, including the Red Sea and East Africa

Overview

  • Native to the Indo-Pacific, frequently found in coastal reefs, rocky outcrops, and lagoons.
  • Recognized for its red and white banded body, with elongated pectoral fins that add to its striking appearance.
  • A smaller species of lionfish, making it a popular choice for home aquariums.
  • Primarily nocturnal, hiding in rock crevices during the day and becoming active at night.
  • Best suited for aquariums with ample live rock formations, caves, and stable water conditions.

Feeding

  • Carnivorous, preying on small fish, shrimp, and crustaceans in the wild.
  • Requires a varied diet including frozen mysis shrimp, silversides, and enriched brine shrimp.
  • May take time to adapt to prepared foods but can be trained to accept frozen options.
  • Should be fed multiple times per week to support metabolism and prevent malnutrition.
  • A high-protein diet supports its predatory instincts and maintains strong fin development.

Habitat

  • Prefers reef-associated environments with moderate water flow and shaded areas.
  • Frequently found resting in caves and under ledges during daylight hours.
  • Aquarium setups should include live rock structures to provide security and natural hunting areas.
  • Requires stable water parameters and excellent filtration to maintain water quality.
  • Providing shaded areas and subdued lighting helps mimic its natural habitat.

Fish Care

  • Optimal water temperature: 74-80°F (23-27°C) for maintaining overall health.
  • Preferred pH range: 8.1-8.4, with a salinity level of 1.020-1.025.
  • Requires regular water changes and stable conditions to prevent stress-related illnesses.
  • Not reef-safe, as it may prey on small fish and ornamental shrimp.
  • Providing a peaceful, low-traffic environment minimizes stress and supports longevity.

Compatibility

  • Semi-aggressive and best housed with similarly sized, non-aggressive fish.
  • Compatible with large angelfish, tangs, and groupers but should not be kept with small reef fish.
  • Should not be housed with very aggressive tankmates that may harass or outcompete it for food.
  • Best kept in a species-specific tank or a carefully curated predator setup.
  • Providing ample hiding spots and a stable environment minimizes territorial disputes.

Aquarium Behavior

  • A slow-moving but observant predator that relies on ambush hunting.
  • Frequently uses its large pectoral fins to corner prey before striking.
  • More active in a dimly lit or evening-lit aquarium environment.
  • Providing a structured environment with caves and rock ledges encourages natural behaviors.
  • Over time, it may become familiar with its caretaker and actively respond during feeding sessions.