Threadfin Fish

Alectis indicus

(1 Reviews)

Threadfin Fish
The Indian Threadfin, with its radiant silver body and distinctive, thread-like fins, is a hypnoitizing addition to any tank. Its graceful swimming and unique appearance make it a captivating choice for hobbyists. Growing to a decent size they are a beautiful choice for a centerpeice for large aquariums.

Threadfin Fish

Alectis indicus

(1 Reviews)

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Threadfin Fish Care Facts

Care Level: Moderate
Temperament: Peaceful
Diet: Omnivore
Reef Safe: Yes
Minimum Tank Size: 450 Gallons
Max Size: 50 inches
The Threadfin Fish, Alectis indicus, often referred to as the Indian Threadfin. It has a thin body with long filament-like fins. These filaments will often be longer than the entire Threadfin itself. It has a silvery-green body with reflective scales and light green stripes. 
They are best kept in larger tank and not housed  with aggressive fish.  They do best in an aquarium with plenty of free swimming space in the water column as they are fast swimmers and very active.  


The Threadfin Fish: A Captivating Addition to Saltwater Aquariums

The Threadfin Fish (Alectis indicus) is a captivating marine species that attracts aquarists with its elegant appearance and peaceful demeanor. This comprehensive guide aims to provide detailed insights into the proper care and maintenance of Threadfin Fish within a saltwater aquarium environment.

Habitat of the Threadfin Fish

Threadfin Fish are commonly found in the tropical waters of the Indian and Western Pacific Oceans, inhabiting coastal areas and reef flats. They prefer warm, clear waters with moderate currents and ample hiding spots from coral formations and rocky crevices.

Reef Compatibility of the Threadfin Fish

Considered reef-safe, Threadfin Fish typically do not pose a threat to corals or other invertebrates within a reef aquarium setting. However, caution should be exercised with smaller crustaceans, as Threadfin Fish may view them as potential prey.

Size and Lifespan of the Threadfin Fish

Threadfin Fish can grow up to 50 inches long, making them a large addition to the aquarium. They can live for up to 10 years or more in captivity with proper care.

Diet of the Threadfin Fish in Captivity

In captivity, Threadfin Fish are omnivorous, requiring a varied diet to thrive. They readily accept a combination of meaty foods such as shrimp, mussels, and fish flesh, supplemented with high-quality marine pellets or flakes.

Aquaculture and Availability of the Threadfin Fish

While Threadfin Fish are not extensively aquacultured, they are occasionally available to hobbyists through reputable marine fish suppliers. Due to their popularity and limited availability, they are often sought after by enthusiasts seeking unique additions to their aquariums.

Compatibility with Other Fish and Invertebrates

Threadfin Fish are generally peaceful and can coexist with a wide range of tank mates, including other non-aggressive species of similar size. Suitable tank mates may include -

Sexual Dimorphism of the Threadfin Fish

Threadfin Fish exhibit minimal sexual dimorphism, with little to no visible differences in appearance between males and females.

Juvenile to Adult Coloration Changes in the Threadfin Fish

As juveniles, Threadfin Fish display vibrant yellow fins and subtle markings along their body. With maturity, their coloration transitions to a silvery hue with distinctive thread-like extensions on their dorsal and anal fins.

Temperament of the Threadfin Fish

Known for their peaceful nature, Threadfin Fish make excellent additions to community aquariums. They are non-aggressive towards tank mates and avoid confrontation, contributing to a harmonious aquatic environment.

Tank Requirements for the Threadfin Fish

To ensure the well-being of Threadfin Fish, it is essential to provide a spacious aquarium with adequate hiding places and swimming room. A minimum tank size of 450 gallons is recommended for a single Threadfin Fish, with larger tanks necessary for multiple specimens or cohabitation with other fish species.

Water Conditions for the Threadfin Fish

Water parameters should be maintained within the following ranges:

  • pH: 8.1 - 8.4
  • Salinity: 1.020 - 1.025
  • Water Temperature: 75°F - 82°F
  • Water Flow: Moderate to strong, mimicking natural ocean currents

Other Common Names for the Threadfin Fish

Threadfin Fish may also be known by the following common names: Indian Threadfish, Indian Threadfin, Blue Threadfin, Blue Spotted Threadfin

Why Choose Threadfin Fish from

Quality Assurance: is committed to providing healthy and ethically sourced marine Fish, ensuring the well-being of every specimen.

Wide Selection: With a diverse inventory of marine species, including Threadfin Fish, offers enthusiasts the opportunity to explore unique additions to their aquariums.

Expert Guidance: provides valuable resources and expert advice to assist aquarists in maintaining thriving marine ecosystems, promoting a rewarding hobbyist experience.

Convenience: With convenient online ordering and reliable shipping services, makes it easy for hobbyists to acquire premium marine Fish without leaving the comfort of their homes.

Customer Satisfaction: Backed by a commitment to customer satisfaction, strives to exceed expectations, delivering exceptional service and support throughout the aquarium acquisition process.

In conclusion, the Threadfin Fish (Alectis indicus) is a captivating marine species suitable for saltwater aquarium enthusiasts seeking a peaceful and visually striking addition to their aquatic community. With proper care and attention to their habitat and dietary needs, Threadfin Fish can thrive in a well-maintained aquarium environment, contributing to the beauty and diversity of the underwater realm.

The first Threadfin Fish arrived DOA but they refunded me quickly and the second one arrived and I could not be happier. Grateful for the good service and the speed they replaced the DOA.

Reviewed by: Brad Smallwood on Dec. 31, 2021

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