Sargassum Angler (Histrio Histrio)

The Sargassum Angler, also known as the Sargassum Frogfish, is a highly unique and camouflaged predator that mimics the appearance of sargassum seaweed. With its mottled body and frilly appendages, this anglerfish blends seamlessly into floating seaweed, waiting patiently to ambush prey. This fascinating species is a rare find in the aquarium trade and is best suited for aquarists experienced in keeping predatory marine species. Its behavior and appearance make it an extraordinary addition to specialized tanks.

Care Information

• Maximum Size: Up to 6 inches.
• Tank Size: 30 gallons minimum; requires a tank with plenty of hiding spots, live rock, and subdued lighting to mimic its natural environment.
• Diet: Carnivorous; feeds on live prey such as small fish, shrimp, and crustaceans. In captivity, it may accept frozen foods like silversides or krill, but live food may be required initially to trigger feeding responses.
• Water Temp: 72-78°F.
• Salinity: 1.020-1.025.
• Aggression: Predatory; not aggressive toward non-prey species but will consume smaller tankmates.
• Skill Level: Advanced; requires specialized care, live feedings, and careful tankmate selection.
• Reef Compatibility: Not reef-safe; while it does not harm corals, its predatory nature means it will consume smaller reef inhabitants like shrimp and small fish.

Special Feature - Master of Camouflage
The Sargassum Angler is a master of disguise, with frilly appendages and a mottled coloration that allow it to blend perfectly with floating sargassum seaweed. This camouflage helps it ambush prey with lightning-fast strikes.

Compatibility
This anglerfish is best kept in a species-specific or predator tank. Avoid housing it with small or fast-swimming fish, as these may become prey. Suitable tankmates include larger, non-aggressive fish or other predatory species.

Coloration

• Tropical Oceans: The Sargassum Angler has a mottled pattern of brown, yellow, and green, resembling floating seaweed. Its appearance may change slightly depending on its environment, enhancing its camouflage abilities​.

Typical Habitat

• Distribution: Found in tropical and subtropical oceans worldwide, often associated with floating sargassum mats where it hunts for small fish and crustaceans. In aquariums, it thrives in tanks that replicate its natural environment with subdued lighting and minimal water flow.