The Ambon Scorpionfish (Pteroidichthys amboinensis) is a rare and intriguing species within the Scorpaenidae family, renowned for its exceptional camouflage and unique appearance. Native to the Indo-Pacific region, this benthic predator is found in areas such as the Red Sea, Indian Ocean, and western Pacific, extending to Fiji, southern Japan, and northern Australia.
Key Information:
• Small fish safe: ⚠️ With caution (may prey on very small fish)
• Small invertebrate safe: ⚠️ With caution (may consume small crustaceans)
• Coral safe: ✅ Yes (does not harm corals)
• Minimum tank size: 115 litres (30 gallons)
• Adult size: Up to 15 cm (6 inches)
• Diet: Carnivorous, feeding on small fish and crustaceans
• Be aware of: Venomous spines; handle with extreme caution
Appearance and Colouration:
The Ambon Scorpionfish exhibits a highly specialized morphology that enhances its ability to blend into its surroundings:
• Body Structure: Possesses numerous skin appendages and tentacles, including well-developed supraocular and posterior lacrimal spines, aiding in its camouflage among algae and soft-bottom habitats.
• Colouration: Varies from mottled blackish to reddish hues, allowing it to seamlessly integrate into its environment.
• Fins: Equipped with flexible dorsal-fin spines that bend easily under slight pressure, distinguishing it from other scorpionfish species.
Natural Habitat and Behaviour:
Pteroidichthys amboinensis typically inhabits algae-rich or soft-bottom habitats, where it remains solitary and relies on its superb camouflage to ambush prey. Its diet primarily consists of small fish and crustaceans. This species is relatively inactive, often staying in one place on the substrate while waiting for prey to approach.
Aquarium Care:
Due to its rarity and specific care requirements, the Ambon Scorpionfish is seldom seen in the aquarium trade. However, for experienced aquarists interested in keeping this species, the following considerations are essential:
• Tank Size: A minimum of 115 litres (30 gallons) is recommended to provide adequate space.
• Aquascaping: Incorporate ample rockwork and caves to offer hiding spots, mimicking its natural habitat. Ensure minimal water currents, as this species prefers low-flow environments.
• Diet: Provide a carnivorous diet high in protein, including marine fish and crustacean flesh, clams, and other meaty foods. Offering live foods such as small mollies or guppies occasionally can stimulate natural hunting behaviors, but these should not constitute a regular diet due to nutritional inadequacies.
• Tank Mates: Select peaceful species that are large enough not to be considered prey and unlikely to nip at the scorpionfish’s fins. Avoid housing with small fish or invertebrates that could be consumed.
Caution: The Ambon Scorpionfish possesses venomous spines that are highly toxic and, in some cases, envenomation can be fatal to humans. Exercise extreme caution when performing tank maintenance or handling this species to prevent injury.
For more detailed information, consulting specialized ichthyological resources or databases is recommended.