Orange Claw Hermit Crab

The Orange Claw Hermit Crab (Calcinus tibicen) is a vibrant and active marine invertebrate, recognized for its distinctive orange claws and dynamic behavior. Its engaging nature and algae-eating habits make it a popular choice for reef aquariums.

Essential Information:

• Common Names: Orange Claw Hermit Crab, Electric Orange Claw Hermit Crab
• Scientific Name: Calcinus tibicen
• Family: Diogenidae
• Origin/Habitat: Native to the Western Atlantic Ocean, including Florida and the Caribbean, inhabiting intertidal zones.
• Maximum Size: Up to 1 inch (2.5 cm)
• Lifespan: Up to 20 years
• Level of Difficulty: Easy; suitable for aquarists of all experience levels
• Reef Safe: Yes; they are considered reef-safe and beneficial for algae control

Appearance & Physical Traits:

• Coloration & Pattern: Features vibrant orange claws with a contrasting dark body, making it a standout among other hermit crab species.
• Body Shape & Structure: Exhibits a conical shell with a sharp point and flat base; elongated siphon used for breathing and feeding.

Habitat & Environmental Needs:

• Minimum Tank Size: A minimum of 5 gallons (19 liters) is recommended per crab to ensure adequate space and food supply.
• Water Temperature: Ideal range is between 72–80°F (22–27°C).
• pH Level: Maintain a pH between 8.1 and 8.4.
• Specific Gravity: Optimal specific gravity ranges from 1.023 to 1.025.
• Aquascape: Provide ample live rock and sandy substrate to offer grazing surfaces and hiding spots. Ensure the tank is well-established with sufficient algae growth to support their dietary needs.

Diet & Feeding:

• Diet Type: Omnivorous scavenger
• Preferred Foods: Primarily consumes various forms of algae, including diatoms, film algae, and detritus. In well-established tanks, they often find enough natural food sources. If algae levels are low, supplementation with algae wafers or blanched vegetables can be provided.
• Feeding Frequency: Generally self-sufficient in established tanks; monitor their condition and supplement as needed.

Behavior & Compatibility:

• Temperament: Peaceful and non-aggressive
• Social Behavior: Solitary; does not require companions but can coexist with other peaceful tank inhabitants.
• Tank Mate Compatibility: Compatible with most reef-safe fish and invertebrates. Avoid housing with predatory species that may harm them.
• Activity Level: Primarily diurnal, being most active during daylight hours.

Care Considerations & Additional Notes:

• Ease of Care: Hardy and adaptable, making them suitable for beginners. They can right themselves if overturned, a trait not common in all hermit crab species.
• Special Requirements: Ensure stable water parameters and avoid sudden changes in salinity or temperature. Acclimate slowly when introducing to a new tank to prevent shock.
• Breeding Info: Breeding in captivity is uncommon but possible. They are broadcast spawners, releasing eggs and sperm into the water column. Successful breeding may require specific conditions, such as water quality and the presence of both sexes.
• Additional Notes: Regular monitoring of water quality is essential. Ensure there is sufficient algae growth to support their dietary needs, or be prepared to provide supplemental feeding.