Blennies

Reef-Safe Algae Eaters with Personality

Blennies are small, comical saltwater fish loved for their quirky behavior, expressive faces, and helpful grazing habits. Known for perching on rocks and “watching” their surroundings, these curious fish are both entertaining and functional—many species help keep aquariums free of nuisance algae.

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Found throughout tropical reefs worldwide, Blennies belong to the Blenniidae family and thrive in tanks with live rock, natural algae growth, and hiding spots. Their elongated bodies, large eyes, and “perching” behavior make them a unique addition to reef and community aquariums alike.

At AquariumFish.com, we offer a wide range of Blennies for sale—from popular algae eaters like the Lawnmower Blenny to colorful reef dwellers such as the Tailspot Blenny and Bicolor Blenny. All are hardy, reef-safe, and shipped overnight for maximum health and vitality.

Why Choose Blennies?

  • Excellent natural algae grazers that help maintain water quality
  • Small, hardy, and reef-safe—great for beginners
  • Unique personalities and fun to observe
  • Compatible with most community and reef setups

Care Tips for Blennies

  • Provide tanks 30 gallons or larger with live rock and hiding spots
  • Feed a mix of algae-based foods, spirulina, and frozen fare
  • Maintain stable salinity (1.023–1.026) and temperature (76–80°F)
  • Avoid housing multiple Blennies in small tanks—they can be territorial with their own kind

Popular Blenny Species We Offer

  • Lawnmower Blenny (Salarias fasciatus) – excellent algae grazer with a comical personality
  • Bicolor Blenny (Ecsenius bicolor) – striking orange and blue coloration; reef-safe and hardy
  • Tailspot Blenny (Ecsenius stigmatura) – small, peaceful, and ideal for nano reefs
  • Starry Blenny (Salarias ramosus) – spotted body and intelligent behavior
  • Midas Blenny (Ecsenius midas) – golden-yellow coloration; active swimmer and great for reefs

Blennies are generally peaceful and thrive in established aquariums with natural rock and algae growth. Their mix of personality and practicality makes them one of the most rewarding additions to any saltwater aquarium.


Blenny FAQs

Are Blennies reef-safe?
Yes — most Blenny species are completely reef-safe and won’t harm corals or invertebrates. They’re great companions for peaceful reef fish and coral setups.
Do Blennies eat algae?
Many species, like the Lawnmower and Starry Blennies, are excellent algae grazers. Even those that don’t rely heavily on algae will nibble and help keep rocks clean.
Can I keep more than one Blenny?
In small tanks, it’s best to keep only one Blenny to avoid territorial disputes. Larger aquariums with multiple rock structures can sometimes support more than one of different species.

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