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Padavensis Hermit Crab

Clibanarius padavensis

An adaptable, highly efficient hermit crab from the Indo-Pacific that easily transitions between brackish and marine tanks to control algae and detritus.

Taxonomy
Class:Malacostraca
Order:Decapoda
Family:Diogenidae
Genus:Clibanarius
Species:Clibanarius padavensis

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Water Temperature

22 - 30 °C

pH Value

7.8 - 8.4

Water type

Brackish / Marine

Invertebrate type

Hermit crab

Adult size

4 cm

Minimum group

>= 1

KH

8 - 12 dKH

Ecological role

Scavenger

Species description

Geographical Origin and Habitat: Clibanarius padavensis is widely distributed throughout the Indo-Pacific region. It inhabits shallow coastal environments such as mangrove swamps, muddy estuaries, brackish lagoons, and tidal flats where salinity fluctuates.
Taxonomy: Belongs to the class Malacostraca, order Decapoda, superfamily Paguroidea, family Diogenidae, and genus Clibanarius. Like all hermit crabs, it has a soft, asymmetric abdomen protected by salvaging empty gastropod shells.
Social Behavior: Peaceful and industrious benthic scavenger. It spends its time climbing rocks and sifting the substrate. They are generally peaceful toward each other but will fight over empty shells if resources are limited.
Coloration and Sexual Dimorphism: Features a brownish-grey coloration with dark, distinct longitudinal stripes running along its legs. The claws are relatively equal in size or slightly asymmetrical. There is no visible external sexual dimorphism.

Care, breeding and tankmates

Tank Setup: Suitable for brackish or marine tanks. Provide rocks for climbing and a sandy or fine gravel substrate. It is absolutely essential to place several empty snail shells of varying sizes in the tank to prevent shell-stealing behavior.
Diet and Feeding: Omnivorous and detritivorous. It is an excellent algae eater, consuming green hair algae, cyanobacteria, and detritus, as well as uneaten fish food. It helps keep the aquarium substrate turned and clean.
Water Quality: Very adaptable: temperature range 22°C to 30°C, pH 7.8 to 8.4. Can transition between brackish and marine environments. Calcium and iodine supplements are beneficial to support the molting process of its exoskeleton.
Compatibility and Tankmates: Safe with fish, corals, and peaceful invertebrates. However, they may attack live snails (like Turbo or Astrea) to steal their shells if empty ones are not provided. Avoid large predatory fish (e.g. puffers).
Aquarium Breeding: Not successfully bred in home aquariums. Eggs are carried by the female inside the shell until they hatch into planktonic larvae, which require complex marine plankton cultures to survive.
Risks and Diseases: Highly sensitive to copper medications and sudden changes in water parameters. During molting, they will hide deep inside their shell or bury themselves slightly in the sand; do not move or disturb them during this phase.

Geographic Origin and Distribution

Clibanarius padavensis is widely distributed throughout the Indo-Pacific region. It inhabits shallow coastal environments such as mangrove swamps, muddy estuaries, brackish lagoons, and tidal flats where salinity fluctuates.

Origin

Tropical oceans and reefsNorth America

Invertebrate profile

Diet
Omnivore
The diet of Clibanarius padavensis typically consists of organic detritus, microalgae, or specific planktonic particles. In a home aquarium, they constantly forage along the substrate or rockwork looking for nourishment. Supplemental feeding with specialized invertebrate pellets or liquid foods may be necessary. Ensuring a varied and nutritious diet will promote vibrant colors and long-term health. Overfeeding should be avoided to maintain optimal water quality.
Ecological role
Scavenger
In the wild, Clibanarius padavensis plays a crucial role in maintaining the balance of its native ecosystem. They often act as natural cleaners, breaking down waste materials and unconsumed food. Their constant movement helps aerate the sand bed and prevent the buildup of toxic gases. By managing algae growth, they create space for slow-growing corals and sponges to thrive. A balanced aquarium ecosystem relies heavily on their diligent cleaning efforts.
Shock sensitivity
High
This invertebrate is highly sensitive to rapid fluctuations in water parameters. Sudden changes in temperature, salinity, or pH can cause severe osmotic shock and death. A slow and careful acclimation process, preferably drip acclimation, is absolutely necessary. Maintain stable aquarium conditions through regular monitoring and automated top-offs. Avoid performing excessively large water changes at once.
Calcium and minerals
Medium
Proper calcium levels are absolutely vital for the structural integrity and growth of this species. They continuously extract calcium carbonate from the water to build their shells, skeletons, or protective tubes. Maintaining calcium levels between 400 and 450 ppm ensures they remain healthy. It is also important to balance alkalinity and magnesium alongside calcium supplementation. Regular testing is required in heavily stocked reef aquariums.
Molting
Shell growth
If applicable to its morphology, this invertebrate undergoes periodic molting to facilitate growth. During the molting process, the organism becomes extremely vulnerable to predation and stress. It is crucial to provide ample hiding spaces, such as caves or crevices, where they can retreat safely. Do not remove the discarded exoskeleton, as they often consume it to quickly replenish essential minerals. Disturbing them during this delicate phase can lead to fatal complications.
Reproduction
Not bred in captivity
Reproduction in the home aquarium is often challenging and rare for many invertebrate species. Most require highly specific environmental triggers, such as temperature shifts or lunar cycles. The resulting larvae usually have a prolonged planktonic stage, making them difficult to rear. Specialized food sources like phytoplankton are needed to sustain the offspring. Consequently, most specimens available in the hobby are wild-caught or professionally aquacultured.
Compatibility & tankmates
Peaceful
Compatibility varies largely based on the specific species and tank mates. They are generally peaceful but can fall prey to aggressive or predatory fish. Ensure they are housed with calm tank mates that will not nip or harass them. Research individual species requirements to avoid territorial disputes. Always monitor new additions carefully to ensure harmonious interactions.

Image gallery

Licensed images linked to the species or, when marked, to the closest representative taxon.

Related species

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Variants and close relatives

Same atlas type, nearby scientific identity, genus, or family.

Mangrove Hermit Crab

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Clibanarius longitarsus

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West African hermit crab

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Clibanarius africanus

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Ambon Hermit Crab

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Blue-eyed Hermit Crab

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Lined Hermit Crab

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Clibanarius lineatus

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Red-stripe hermit crab

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Snellius's hermit crab

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Stebbing's Hermit Crab

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Yellow-tipped Hermit Crab

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Clibanarius virescens

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Zebra Hermit Crab

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Clibanarius zebra

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Blood-spotted Hermit Crab

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Clibanarius cruentatus

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Blue-stripe Hermit Crab

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Clibanarius merguiensis

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Similar care

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Boschma's hermit crab

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Common Atlantic hermit crab

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Last updated: 06/30/2026