Blackline Blenny

Blackline Blenny
Latin name:
(Meiacanthus nigrolineatus)

Care Level





Black, Blue, Yellow



Preferred Conditions

sg 1.020-1.025, 72-78° F, dKH 8-12, pH 8.1-8.4

Avg. Max Size


Minimum Tank Size

10 gallons


Highest Rated Food
Highest Rated Coloring Enhancing Fish Food
Fluval Bug Bites Color Enhancing Fish Food
Insect Larvae & Salmon Recipe Fish Food
The Fluval Bug Bites Color Enhancing Fish Food for Tropical Fish is a highly rated product. The granules are designed to enhance the color of tropical fish, and many customers have noticed a significant improvement in the vibrancy of their fish’s colors. The food is made with high-quality ingredients and is easily digestible for the fish. Superior in terms of color enhancement. #1 Recommended Fish Food

Have you ever heard of the Blackline Blenny? This small, yet captivating fish species is a true wonder of the underwater world. With its striking appearance and intriguing behavior, the Blackline Blenny has captured the attention of marine enthusiasts worldwide.

Blackline Blenny: An Overview

The Blackline Blenny, scientifically known as Meiacanthus nigrolineatus, is a member of the Blenniidae family. These fish are typically found in the tropical waters of the Indo-Pacific region, including the Red Sea, East Africa, and the islands of the Pacific Ocean.

Blackline Blennies are relatively small fish, with adults reaching an average length of around 4 inches (10 centimeters). They have an elongated, slender body with a flattened head and a pair of prominent eyes. The most distinctive feature of the Blackline Blenny is the black line that runs along the length of its body, from the snout to the tail.

Habitat and Behavior

Blackline Blennies are found in a variety of habitats, including coral reefs, rocky shores, and seagrass beds. They are typically found in shallow waters, ranging from the intertidal zone to depths of around 60 feet (18 meters).

These fish are known for their territorial behavior. Males establish and defend territories, which they use for feeding, breeding, and shelter. Blackline Blennies are also known to be quite aggressive towards other fish, especially during the breeding season.

Diet and Feeding Habits

Blackline Blennies are omnivorous feeders, with a diet that consists of a variety of small invertebrates, such as crustaceans, mollusks, and worms. They also feed on algae and detritus.

These fish are active feeders and spend a significant portion of their time searching for food. They use their sharp teeth to scrape algae and other food particles from rocks and other surfaces.

Reproduction and Life Cycle

Blackline Blennies reproduce sexually, with males and females forming pairs during the breeding season. The female lays her eggs in a nest, which is typically located in a crevice or under a rock. The male then guards the eggs until they hatch.

The eggs hatch after a period of around 10 days, and the larvae drift in the plankton for several weeks before settling down on the bottom and transforming into juvenile fish.

Conservation Status

The Blackline Blenny is not currently considered to be a threatened or endangered species. However, like many other marine fish, they are vulnerable to habitat loss and degradation, as well as overfishing.

Conservation efforts are underway to protect the Blackline Blenny and its habitat. These efforts include the establishment of marine protected areas and the promotion of sustainable fishing practices.

FAQs About the Blackline Blenny

  1. What is the average lifespan of a Blackline Blenny?
    The average lifespan of a Blackline Blenny is around 5 years in the wild.
  2. What are some of the threats faced by the Blackline Blenny?
    The Blackline Blenny faces threats such as habitat loss, degradation, and overfishing.
  3. What can be done to protect the Blackline Blenny?
    Conservation efforts such as the establishment of marine protected areas and the promotion of sustainable fishing practices can help protect the Blackline Blenny and its habitat.


The Blackline Blenny is a fascinating and unique fish species that plays an important role in the marine ecosystem. With its striking appearance, intriguing behavior, and ecological significance, the Blackline Blenny is a true wonder of the underwater world.

As we continue to learn more about this amazing fish, we can work together to protect it and its habitat for future generations.