Blue Line Trigger

Pseudobalistes fuscus

(1 Reviews)

Blue Line Trigger

Blue Line Trigger

Pseudobalistes fuscus

(1 Reviews)

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Blue Line Trigger Care Facts

Care Level: Easy
Temperament: Semi-Aggressive
Diet: Carnivore
Reef Safe: No
Minimum Tank Size: 120 Gallons
Max Size: 12 inches

The Blue Line Trigger is commonly referred to as the Rippled Triggerfish. It often blows sand and substrate looking for invertebrates to eat..  The Blue Line Trigger has the typical triggerfish anal and dorsal fins, along with a crescent shaped tailfin. Like all Triggerfish, the Bluelined Triggers have a spine located on the top of their head that can be locked in an erect position to help lock them in place when hiding in rocks or corals. They are not reef safe and will eat corals and inverts so they are recommended for large FOWLR tanks.

The Blue Line Triggerfish for Your Aquarium

The Blue Line Triggerfish, scientifically known as Pseudobalistes fuscus, is a fascinating and attractive marine species that can be an excellent addition to your saltwater marine aquarium. This comprehensive product description will cover various aspects of keeping the Blue Line Triggerfish, providing essential information for hobbyists and potential buyers.

Blue Line Triggerfish Habitat

The Blue Line Triggerfish is native to the Indo-Pacific region, inhabiting coral reefs, lagoons, and rocky substrates. This species prefers areas with ample hiding spots and a mix of live and rocky structures. It's important to replicate this habitat in your aquarium to ensure the well-being of your Blue Line Triggerfish.

Reef Compatibility of Blue Line Triggerfish

Blue Line Triggerfish are not considered reef-safe due to their natural foraging behavior. They may disturb corals and invertebrates within the reef environment, so keeping them in fish-only or fish-only-with-live-rock (FOWLR) setups is advisable.

Size and Lifespan of Blue Line Triggerfish

In captivity, Blue Line Triggerfish can grow up to 12 inches (30 cm) in length. They have a relatively long lifespan, typically 10 to 15 years, if provided with proper care.

Diet of Blue Line Triggerfish in Captivity

These triggerfish are omnivorous and have a varied diet. They will readily accept a diet of high-quality marine pellets, frozen foods, and live or frozen seafood. A balanced diet is essential to keep your Blue Line Triggerfish healthy and vibrant.

Aquaculture and Availability of Blue Line Triggerfish

Blue Line Triggerfish are not commonly aquacultured; they are occasionally available to hobbyists through reputable suppliers and online retailers like

Compatibility with Other Fish and Invertebrates

Blue Line Triggerfish can be somewhat aggressive, especially when they feel threatened or establish their territory. Choosing tankmates carefully is crucial, opting for species that can handle their occasional aggression. Some suitable tankmates might include the Yellow Tang, Foxface Rabbitfish, Foxface Lo, and large angelfish.

Sexual Dimorphism of Blue Line Triggerfish

Blue Line Triggerfish do not exhibit significant sexual dimorphism, making it challenging to distinguish between males and females visually.

Coloration Changes from Juvenile to Adult in Blue Line Triggerfish

Juvenile Blue Line Triggerfish exhibit striking blue lines running across their bodies, which become less prominent as they mature. As they grow, their coloration transitions into a more subdued but equally attractive blend of blue and yellow shades, creating a unique and appealing appearance.

Temperament of Blue Line Triggerfish

The Blue Line Triggerfish is known for its territorial and sometimes aggressive nature. They can become territorial as they mature and establish their own space within the aquarium. Providing plenty of hiding spots and territories for them can help mitigate aggression.

Tank Requirements for Blue Line Triggerfish

To ensure the well-being of your Blue Line Triggerfish, you'll need a tank with a minimum capacity of 120 gallons. These fish require ample swimming space, hiding spots, and the option to rearrange their environment to establish territories.

Water Conditions for Blue Line Triggerfish

Maintaining stable water conditions is vital for the health of your Blue Line Triggerfish. Here are the recommended parameters:

  • pH: 8.1 to 8.4
  • Salinity: 1.020 to 1.025
  • Water Temperature: 75 to 82°F (24 to 28°C)
  • Water Flow: Moderate to strong, replicating the natural current of their native habitat.

Common Names for Blue Line Triggerfish

The Blue Line Triggerfish is known by several names, including the Blue-Spined Triggerfish, Blue Line Trigger, and Yellowspine Triggerfish.

Five Compatible Tank Mates

  • Naso Tang: Known for their vibrant blue and yellow coloration, Yellow Tangs are a popular choice in saltwater aquariums.
  • Foxface Rabbitfish (Siganus vulpinus): These peaceful herbivores add diversity and color to your aquarium while helping control algae.
  • Foxface One Spot (Siganus unimaculatus): Similar to the Foxface Rabbitfish, they are a peaceful addition that helps with algae control.
  • Emperor Angelfish (Pomacanthus imperator): If you have a large tank, this stunning angelfish species can coexist with Blue Line Triggerfish.
  • Powder Blue Tang (Acanthurus leucosternon): These elegant tangs are another excellent choice for larger saltwater setups.

Why Choose the Blue Line Triggerfish from is a reputable source for acquiring marine fish and invertebrates for your aquarium. They are known for their high standards of care and quarantine procedures, ensuring that the fish they offer are healthy and disease-free. When you purchase a Blue Line Triggerfish from, you can be confident that you are receiving a high-quality specimen that will thrive in your aquarium.

The Blue Line Triggerfish is a captivating addition to any saltwater marine aquarium. While they may not be reef-safe, their striking appearance and engaging behavior make them popular among experienced aquarists. Remember to provide the right tank conditions, compatible tank mates, and a balanced diet to ensure the well-being and longevity of your Blue Line Triggerfish. When purchasing from, you can have confidence in the quality of your new marine addition.

The Blue Line Trigger was received in great shape and has added life to my saltwater aquarium. Thanks

Reviewed by: Noel Henricks on Jan. 1, 2022

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