Yellowtail Blenny
The Yellowtail Blenny has a black or very dark body with yellow on its tail.
Blennies can be kept with most other community tankmates like damsels, clownfish and angels but they may become territorial with time and will defend against trespassers. Blennies typically do not tolerate others of the same species except in very large aquariums with enough territory to accommodate their need for space. They are safe for reef aquariums and will not harm most invertebrates, with the possible exception of small crustaceans like Sexy Shrimp. They spend most of the time on or around the bottom, or perching in the rockwork of the aquarium.
- Scientific Name: Ecsenius flavipes
- Origin: Indonesia
| Species | Ecsenius flavipes |
|---|---|
| Body Color | Black or very dark body with yellow tail |
| Habitat | Reef aquariums, rocky substrates |
| Behavior | Territorial; prefers space; active on bottom or rockwork |
| Compatibility | Good with most community fish; avoid same species unless tank is very large |
FAQ
Can Yellowtail Blenny be kept with clownfish?
Yes, Yellowtail Blenny can be kept with clownfish as they are generally compatible in community tanks.
Will Yellowtail Blenny harm invertebrates in a reef tank?
They are safe for most invertebrates, though they may pose a threat to small crustaceans like Sexy Shrimp.
Do Yellowtail Blenny require a lot of space?
They need ample territory and are best suited in large aquariums to prevent territorial aggression.

Claire Scott –
The Yellowtail Blenny looks great in my 55-gallon tank. It stays near the rocks and doesn’t seem aggressive. I’ve added a few other fish, and it coexists peacefully with my clownfish and damsels. Only noticed it gets a bit territorial when two are present, but I only have one.
Rose Mackay –
It’s a striking fish with a clear yellow tail. I placed it in a reef tank with corals and it hasn’t damaged any of them. It spends most of its time on the substrate, which is perfect for the tank’s layout.
Amy Lewis –
The fish is active and curious. I had to ensure there were enough rocks for it to perch on. It’s not aggressive, but I’ve seen it chase a small shrimp once, so I now keep it separate from tiny crustaceans.