Sargassum Angler (Histiostrio histrio) – XL Size: 5″ to 6″
The Sargassum Angler is a robust, aggressive fish species suitable for reef aquariums. It is well-suited for intermediate-level aquarists who can manage its active behavior and specific care requirements.
Reef Compatible: Yes
Care Level: Intermediate
Disposition: Aggressive
Minimum Tank Size: 50 gallons
Mature Size: 15 inches
| Feature | Detail |
|---|---|
| Species | Histrio histrio |
| Size (Adult) | 15 inches |
| Size (Current) | 5″ to 6″ |
| Compatibility | Reef compatible |
| Behavior | Aggressive |
| Minimum Tank Size | 50 gallons |
FAQ
Is the Sargassum Angler safe to keep with other fish in a reef tank?
The Sargassum Angler is aggressive and may pose a threat to smaller or slower-moving fish. It is recommended to keep it in a tank with larger, robust species and avoid housing it with delicate or small fish.
How long does it take for a Sargassum Angler to reach its mature size?
It typically takes 2 to 3 years for a Sargassum Angler to reach its mature size of 15 inches, depending on tank conditions and diet.
Can this fish be kept in a tank smaller than 50 gallons?
Please contact customer service


Gordon Stewart –
I’ve had the Sargassum Angler for six months now. It’s quite active and definitely not for beginners. I keep it with larger fish and it hasn’t attacked any of them. The tank is 60 gallons and it’s thriving. Needs a lot of space and a good hiding place though.
Pippa Rees –
This fish is bold and interesting. I expected aggression, and it’s not shy about it. I made sure to have a spacious tank and plenty of rock structures. It’s become a centerpiece in my reef setup. Worth the effort if you’re prepared for its behavior.
Dan Greene –
It’s aggressive and I had to remove a small shrimp that got too close. I’m not sure if it’s reef-safe in a mixed community. I’d recommend only keeping it with larger, hardy fish.