Rhino Blenny - Atlantic

Paraclinus marmoratus

(0 Reviews)

Rhino Blenny - Atlantic

Rhino Blenny - Atlantic

Paraclinus marmoratus

(0 Reviews)

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Care Facts

Care Level: Easy
Temperament: Peaceful
Diet: Carnivore
Origin: Eastern Atlantic
Acclimation Time: 2+ hours
Reef Safe: Yes
Minimum Tank Size: 30 gallons
Max Size: 4 inches

Paraclinus marmoratus are referred to as Rhino Blennies due to their prominent horn-like fin protruding from their head. Their other common name, Marbled Blenny, is due to their beautiful mottled beige and red coloration, giving a marbled appearance. They are a timid and slow fish that hide among seaweed and vegetation. They are ambush predators, waiting for smaller fish or crustaceans to float by. They are peaceful and should be kept with other peaceful, timid fish.   

Rhino Blenny (Paraclinus marmoratus) - A Captivating Addition to Your Saltwater Marine Aquarium

The Rhino Blenny (Paraclinus marmoratus) is a popular and captivating addition to saltwater marine aquariums. In this comprehensive product description, we will cover all essential aspects of keeping the Rhino Blenny, ranging from its habitat, reef compatibility, size, lifespan, diet in captivity, aquaculture availability, compatibility with other aquatic species, sexual dimorphism, coloration changes from juvenile to adult, temperament, tank requirements, and water conditions. We will also provide you with some common names for the species and suggest five compatible tank mates. Additionally, we'll explain why choosing Saltwaterfish.com for your Rhino Blenny is a wise decision.


Habitat of the Rhino Blenny:


The Rhino Blenny, Paraclinus marmoratus, is native to the warm waters of the Western Atlantic Ocean, commonly found in coral reefs and rocky substrates. They inhabit shallow, coastal areas with ample crevices and hiding spots among rocks and corals.


Reef Compatibility of Rhino Blenny:


The Rhino Blenny is considered a reef-safe species, making it an excellent choice for reef aquariums. They are peaceful and do not tend to harm corals or other invertebrates, ensuring a safe addition to your reef ecosystem.


Size and Lifespan of Rhino Blenny:


Rhino Blennies are relatively small, with an average adult size of about 4 inches. In a well-maintained aquarium, they can live for up to 4-6 years.


Diet in Captivity:


Rhino Blennies are omnivorous and have a diverse diet. They readily accept a combination of frozen and live foods, such as brine shrimp, Mysis shrimp, and copepods. Additionally, they will nibble on marine algae and graze on microorganisms in the aquarium.


Aquaculture Availability:


Rhino Blennies are occasionally available through aquaculture but can vary. It is advisable to check with reputable suppliers to confirm their availability for hobbyists.


Compatibility with Other Fish and Invertebrates:


Rhino Blennies have a peaceful temperament, making them compatible with a wide range of fish and invertebrate species. They rarely show aggression, and their playful nature can be an entertaining addition to your marine community.


Sexual Dimorphism:


Sexual dimorphism in Rhino Blennies is minimal, and it can be challenging to differentiate between males and females based on visual characteristics alone. However, males may be slightly larger and exhibit more prominent features.


Juvenile to Adult Coloration Changes:


Juvenile Rhino Blennies often display vibrant colors, including shades of blue, yellow, and white. Their hues may become more subdued as they mature, with some individuals developing a brownish or greenish tint. The specific coloration may vary among individuals.


Temperament of Rhino Blenny:


Rhino Blennies are known for their peaceful and non-aggressive nature. They are not territorial and are generally sociable with tank mates, making them suitable for community aquariums.


Tank Requirements for Rhino Blenny:


To ensure the well-being of Rhino Blennies, it's essential to provide them with an appropriate aquarium setup:

  • Minimum Aquarium Size: A 30-gallon aquarium is sufficient for a single Rhino Blenny. However, consider a larger tank with ample hiding spaces if you plan to keep a pair or a small group.
  • Water Conditions:       
    • pH: Maintain a pH level between 8.1 and 8.4.
    • Salinity: Keep the salinity levels within the standard range for marine aquariums, around 1.023 to 1.025.
    • Water Temperature: Maintain a temperature range of 74-78°F (23-26°C).
    • Water Flow: Rhino Blennies appreciate moderate water flow within the aquarium to mimic the conditions of their natural habitat.

Common Names:


Apart from the Rhino Blenny, this species is known by various names, including the Marble Blenny, Canary Blenny, and Rock Blenny.


Five Compatible Tank Mates:

  • Clownfish (Amphiprion spp.): These iconic reef inhabitants are known for their symbiotic relationships with anemones and are a popular choice for a marine community tank.
  • Firefish Goby (Nemateleotris spp.): Their striking appearance and peaceful nature make them great tank mates for Rhino Blennies.
  • Royal Gramma (Gramma loreto): These colorful fish are known for their vivid purple and yellow hues and are generally non-aggressive.
  • Cleaner Shrimp (Lysmata amboinensis): These invertebrates help maintain water quality and make exciting additions to the aquarium.
  • Yellow Watchman Goby (Cryptocentrus cinctus): They often form symbiotic burrows with pistol shrimp, creating an intriguing and dynamic display in the tank.

Why Choose Saltwaterfish.com:


Saltwaterfish.com is a reputable source for marine aquarium livestock and supplies, including the Rhino Blenny. They are known for their commitment to quality and customer satisfaction. Here are some reasons to consider Saltwaterfish.com for your Rhino Blenny purchase:

  • Wide Selection: They offer diverse marine species and products to meet your aquarium needs.
  • Quality Assurance: Saltwaterfish.com prioritizes the health and well-being of the animals they provide, ensuring you receive healthy specimens.
  • Expert Advice: Their knowledgeable staff can assist you with any questions or concerns regarding your aquarium and its inhabitants.
  • Shipping Convenience: They have a reliable shipping process in place, ensuring the safe arrival of your new additions.
  • Customer Reviews: Positive feedback from fellow hobbyists attests to their commitment to excellence.



In conclusion, the Rhino Blenny is a captivating and peaceful addition to your saltwater marine aquarium. With the proper care and compatible tank mates, it can thrive in a well-maintained reef ecosystem. Consider acquiring your Rhino Blenny from Saltwaterfish.com for a reliable and quality-assured purchase. Enjoy the beauty and charm of this fascinating marine species in your home aquarium.

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