Yellow Striped Clingfish

The Yellow Striped Clingfish (Diademichthys lineatus) is a nano reef fish known for pest control behavior, including picking at parasitic bivalves found on corals. It has a slender reddish-brown body with yellow longitudinal striping and a yellow spot on the tail, and it uses a suction disc to “cling” to rockwork, coral bases, and aquarium glass.

What You’ll Observe:

• Perching and clinging behavior, often staying attached to the same favorite surfaces for long stretches
• Short, deliberate swims between perches, then settling back onto rock, coral branches, or the glass
• Focused “micro-hunting” during feedings as it tracks and snaps at tiny meaty items
• Close association with structure (branching coral shapes, ledges, and similar shelter zones)

To do well, provide a mature nano reef with stable parameters and plenty of live rock structure; many keepers also provide branching coral-shaped habitat or a long-spined urchin-style host area. Offer very small meaty foods (finely chopped seafood, mysis, enriched brine, and other carnivore preparations) in multiple small feedings so it can eat at its pace. A calm, consistent feeding routine helps it settle in and become more visible at mealtimes.

Does it “need” a long-spined urchin, or is rockwork enough?
Many hobbyists report the fish will choose a preferred “host zone” (urchin or branching structure) and spend most of its time there; the key is giving it a protected perch it can return to consistently.

What foods tend to work best when it’s newly introduced?
Keepers frequently start with very small, high-scent items (live/hatched baby brine, copepods, roe-style foods) and then transition to frozen micro-meats once a feeding response is established.

Will it bother ornamental shrimp or other tiny tankmates?
Discussions often note it behaves like a micro-predator—generally ignoring larger animals, while showing interest in very small shrimp or anything that can fit in its mouth.

Is it normal for it to “vanish” for a day or two in a new tank?
Hobbyists commonly describe a pattern of picking a discreet perch and staying tucked in until it learns the tank’s rhythm; regular small feedings tend to bring it out more reliably.

How do I prevent it from ending up in an overflow or back chamber?
Because it’s narrow-bodied and likes tight spaces, reefers often use fine mesh/guards on overflows and pump intakes and make sure common entry slots are covered.

Each fish is checked for strong appetite and activity before we approve it for your tank.