Blue Fin Watchman Goby

Cryptocentrus fasciatus

(0 Reviews)

Blue Fin Watchman Goby

Blue Fin Watchman Goby

Cryptocentrus fasciatus

(0 Reviews)

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Blue Fin Watchman Goby Care Facts

Care Level: Easy
Temperament: Peaceful
Reef Safe: Yes
Diet: Carnivore
Origin: Indian Ocean
Acclimation Time: 2+ hours
Coral Safe: Yes
Invertebrate Safe: Yes
Minimum Tank Size: 30 gallons

The Blue Fin Watchman Shrimpgoby (Cryptocentrus fasciatus), also known as the Y-Bar Watchman, can be found among the rocky outcroppings of southern Asia. They have a brown or tan body with light stripes along the dorsal section, as well as a vibrant blue anal fin and blue specks peppering the body. They are known to form a symbiotic relationship with shrimps to secure their burrows. The Watchman thrives in tanks with plenty of live rock, a sandy substrate, and a tightly sealed lid to prevent escapes. Only one should be kept in each aquarium unless it is in a very large tank as they can become territorial. They will feed on a varied carnivorous diet and are known to be able to spawn in home aquariums. Males and females differ slightly as the females have a more muted coloration. Overall, this is one of the best all-around fish you can have in your tank. It is easy to care for, hardy, fun to watch, beautiful, and a wonderful tank mate. 

The Blue Fin Watchman Goby (Cryptocentrus fasciatus) in Saltwater Aquariums

Introducing the Blue Fin Watchman Goby (Cryptocentrus fasciatus), a fascinating addition to saltwater marine aquariums, renowned for its captivating behavior and striking appearance. This informative product description aims to provide an in-depth understanding of the Blue Fin Watchman Goby, covering crucial aspects essential for enthusiasts seeking to care for this species in a home aquarium.

Habitat of the Blue Fin Watchman Goby

The Blue Fin Watchman Goby is commonly found in the Indo-Pacific region, inhabiting sandy and silty substrates near coral reefs and rocky formations. This species is known for its burrowing behavior, creating intricate burrows within the substrate where it seeks refuge and establishes its territory.

Reef Safety for the Blue Fin Watchman Goby

The Blue Fin Watchman Goby is generally considered reef-safe, making it a suitable choice for reef aquariums. Its burrowing behavior poses minimal threat to coral and other invertebrates. However, caution should be exercised when selecting tank mates to ensure compatibility with this species.

Size and Lifespan of the Blue Fin Watchman Goby

This goby species typically reaches a size of 3 to 4 inches (7.6 to 10.2 cm) in captivity. With proper care, Blue Fin Watchman Gobies can live up to 5 years, allowing enthusiasts to enjoy their captivating presence for an extended period.

Diet in Captivity: Feeding the Blue Fin Watchman Goby

Feeding the Blue Fin Watchman Goby is relatively straightforward, as it readily accepts a variety of small marine foods. To meet its nutritional needs, a well-balanced diet should include high-quality pellets, frozen or live brine shrimp, mysis shrimp, and other small invertebrates.

Aquaculture Availability of the Blue Fin Watchman Goby

As of the latest information, Blue Fin Watchman Gobies are not commonly aquacultured. However, they are readily available to hobbyists through reputable suppliers, enhancing accessibility for enthusiasts looking to add this species to their aquarium.

Compatibility with Other Fish and Invertebrates

The Blue Fin Watchman Goby exhibits a peaceful temperament, making it compatible with various marine fish and invertebrates. However, it is crucial to avoid aggressive tank mates that may pose a threat to this species or compete for its territory.

Sexual Dimorphism in the Blue Fin Watchman Goby

Distinguishing between male and female Blue Fin Watchman Gobies can be challenging, as they generally exhibit minimal sexual dimorphism. Visual cues may become more apparent during the breeding season, with subtle differences in coloration and behavior.

Juvenile to Adult Coloration Changes in the Blue Fin Watchman Goby

Juvenile Blue Fin Watchman Gobies often display more vibrant colors than adults. The distinctive blue fin markings become more pronounced as the fish matures, adding to its visual appeal.

Temperament of the Blue Fin Watchman Goby

Known for their calm and non-aggressive nature, Blue Fin Watchman Gobies make excellent additions to community aquariums. Their burrowing behavior and tendency to perch on rocks or coral structures contribute to a dynamic and engaging display within the aquarium.

Tank Requirements for the Blue Fin Watchman Goby

To ensure the well-being of Blue Fin Watchman Gobies, it is recommended that a suitable environment is provided. A minimum aquarium size of 30 gallons is advisable, with ample sandy substrate to accommodate their burrowing behavior. Adequate hiding places like caves or rock formations should be incorporated into the tank design to meet their habitat preferences.

Water Conditions for the Blue Fin Watchman Goby

  • pH: Maintain a pH level between 8.1 and 8.4.
  • Salinity: Keep salinity levels within the range of 1.020 to 1.025.
  • Water Temperature: Maintain a temperature range of 75°F to 80°F (24°C to 27°C).
  • Water Flow: Moderate water flow is suitable, simulating the gentle currents in their natural habitat.

Common Names of the Blue Fin Watchman Goby

The Blue Fin Watchman Goby may be known by various names, including Yellow Prawn Goby and Watchman Goby.

Five Compatible Tank Mates for the Blue Fin Watchman Goby

Why Purchase from

When considering the acquisition of Blue Fin Watchman Gobies, stands out as a reliable source for quality marine livestock. With a commitment to sustainability and the well-being of marine species, ensures that all specimens are carefully acclimated and quarantined before reaching customers. With a diverse selection, expert advice, and a reputation for excellence, is the go-to destination for enthusiasts seeking to enhance their saltwater aquariums with the captivating Blue Fin Watchman Goby.

In conclusion, the Blue Fin Watchman Goby is a captivating and manageable species for saltwater marine aquariums. Its alluring appearance and peaceful disposition add a unique dynamic to the aquatic environment. Enthusiasts can confidently choose the Blue Fin Watchman Goby to create a vibrant and harmonious community within their home aquariums.

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