Midas Blenny Tankmates Guide
Midas Blennies are peaceful with virtually all community reef fish but can show territorial behavior toward other blennies or similarly shaped elongated fish. Planning tankmates around this one consideration makes the rest straightforward.
Good Tankmates
Clownfish
A natural community pairing. Clownfish occupy a different niche — near their host anemone or coral — and pose no threat to the Midas Blenny. Compatible in virtually any reef setup.
Firefish
Peaceful upper-water-column fish that ignore blennies entirely. Both are calm, non-aggressive species. A reliable community pairing.
Royal Gramma
Cave-dwelling and peaceful. Stays in the rockwork and does not interact territorially with mid-water blennies.
Pajama and Banggai Cardinalfish
Peaceful mid-water fish that occupy a different niche from the rockwork-associated blenny. No territorial interaction.
→ Pajama Cardinalfish Care Guide | Banggai Cardinalfish Care Guide
Yellow Watchman Goby
Bottom-dwelling and sandbed-associated. Completely different niche from the mid-water Midas Blenny. No territorial overlap.
→ Yellow Watchman Goby Care Guide
Tangs
Active open-water swimmers. No territorial interaction with blennies in appropriately sized tanks.
Corals and Invertebrates
Midas Blennies are generally reef-safe. Monitor with LPS corals and clam mantles — occasional nipping has been reported in some individuals but is not typical behavior.
→ Is the Midas Blenny Reef Safe?
Tankmates to Avoid or Use Caution With
Other Blennies
The most important consideration. Midas Blennies can be territorial toward other blennies and similarly shaped elongated fish. In most tanks, keep only one blenny species. In a larger system with ample rockwork and territory, a Midas and a Tailspot can sometimes coexist — but this is not guaranteed and should be monitored.
→ Midas Blenny vs Tailspot Blenny
Large Predatory Fish
Lionfish, groupers, large hawkfish, and other predators may view the Midas Blenny as prey. Avoid in the same system.
Aggressive or Highly Territorial Fish
Dottybacks, some damselfish, and other persistently aggressive species can stress a Midas Blenny. Avoid in smaller tanks where the blenny cannot escape harassment.