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Snellius's hermit crab

Clibanarius snelliusi

A small, peaceful marine hermit crab native to the Indo-Pacific. Ideal for nano reefs, it actively grazes on detritus and algae. Completely reef-safe, but highly sensitive to copper.

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

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Water Temperature

22 - 28 °C

pH Value

8.1 - 8.4

Water type

Marine

Invertebrate type

Hermit crab

Adult size

2.5 cm

Minimum group

>= 1

KH

8 - 12 dKH

Ecological role

Scavenger

Species description

Geographical Origin and Habitat: Native to the tropical waters of the Central Indo-Pacific, particularly around Indonesia, Malaysia, the Philippines, and Melanesian reef systems. It primarily inhabits intertidal zones, shallow coral reefs, and sandy lagoons rich in detritus and rubble, at depths of 0 to 10 meters.
Taxonomy: Clibanarius snelliusi is a small decapod crustacean belonging to the family Diogenidae, genus Clibanarius. Named after the Dutch research vessel "Willebrord Snellius," it features small, equal-sized claws (chelae) adapted for gathering fine organic detritus.
Social Behavior: A peaceful and social species. In nature, they form large aggregations grazing on rocky flats during low tide. In the aquarium, they are tireless workers, constantly searching for food. They show no aggression towards fish or corals, but can squabble with other hermit crabs if empty shells are scarce.
Coloration and Sexual Dimorphism: Features reddish-brown or grayish legs and claws, often marked with light cream or yellowish longitudinal stripes along the leg segments. The soft abdomen is protected by discarded gastropod shells. There is no visible external sexual dimorphism.

Care, breeding and tankmates

Tank Setup: Well-suited for small aquariums (nano reefs) starting from 30-50 liters (10-15 gallons). Provide plenty of live rock for climbing and a sandy substrate. It is crucial to scatter several empty gastropod shells of different sizes in the tank to allow the hermit crab to molt and move into larger shells.
Diet and Feeding: An excellent detritivore and opportunist. It eats filamentous algae, diatoms, fish food leftovers, and organic detritus. In very clean tanks, supplement their diet occasionally with dry crustacean pellets or pieces of dried seaweed (nori) to prevent starvation.
Water Quality: Requires standard marine parameters: specific gravity 1.023-1.025, water temperature 24-28°C (75-82°F), pH 8.1-8.4, and dKH 8-12. Keep copper levels at zero. Proper calcium and magnesium levels are necessary to support the molting process.
Compatibility and Tankmates: Completely reef-safe. Compatible with peaceful community fish, corals, and other non-predatory invertebrates. Avoid keeping them with known crustacean predators like triggerfish, large wrasses, and puffers that can easily crush their protective shells.
Aquarium Breeding: Breeding in captivity is extremely difficult. Although they spawn and release larvae (zoea) into the water, the planktonic stages are filter-fed by corals or removed by filtration systems, making successful rearing to adulthood in home aquaria highly unlikely.
Risks and Diseases: The molting period is the primary risk phase, when the hermit crab is soft and vulnerable. If empty shells are not provided, it may attack living snails (like Astrea or Nassarius) to steal their shells, creating conflict in the clean-up crew.

Geographic Origin and Distribution

Native to the tropical waters of the Central Indo-Pacific, particularly around Indonesia, Malaysia, the Philippines, and Melanesian reef systems. It primarily inhabits intertidal zones, shallow coral reefs, and sandy lagoons rich in detritus and rubble, at depths of 0 to 10 meters.

Origin

Tropical oceans and reefsSouth and Southeast Asia

Invertebrate profile

Diet
Omnivore
*Clibanarius snelliusi* is an omnivorous scavenger that constantly forages for food. It primarily feeds on detritus, uneaten fish food, and various types of nuisance algae. Supplemental feedings of sinking pellets or meaty foods may be necessary in very clean tanks.
Ecological role
Scavenger
This species serves as an essential part of the aquarium's clean-up crew. By consuming decaying matter and controlling algae growth, it helps maintain optimal water quality. Its continuous sifting of the sand bed also promotes healthy substrate aeration.
Shock sensitivity
Medium
*Clibanarius snelliusi* is susceptible to sudden fluctuations in water parameters, particularly salinity and temperature. Careful drip acclimation is highly recommended when introducing them to a new environment. Stable parameters are crucial for their long-term health and survival.
Calcium and minerals
Medium
Sufficient calcium and alkalinity levels are required for *Clibanarius snelliusi* to build and harden its exoskeleton during molting. While they don't grow their own shells, a healthy exoskeleton is vital. Regular partial water changes usually replenish these elements adequately.
Molting
Shell growth
During the molting process, *Clibanarius snelliusi* will shed its old exoskeleton and remain in hiding while the new one hardens. It is crucial to provide slightly larger empty shells for them to move into as they grow. Never disturb a molting hermit crab, as they are extremely vulnerable.
Reproduction
Oviparous
Breeding *Clibanarius snelliusi* in a home aquarium is extraordinarily difficult due to their complex planktonic larval stages. Females carry the fertilized eggs on their pleopods until they hatch into the water column. The larvae require specialized microscopic foods and precise conditions to survive.
Compatibility & tankmates
Peaceful
Generally peaceful, *Clibanarius snelliusi* is considered highly reef-safe and won't intentionally harm healthy corals. However, they may occasionally trample over delicate zoanthids or snatch food from slow-moving tank mates. If a larger empty shell is not provided, they might attack snails to steal theirs.

Image gallery

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

Related species

Recommendations grouped by close relatives, companion choices, and similar care.

Variants and close relatives

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

Ambon Hermit Crab

Ambon Hermit Crab

Clibanarius ambonensis

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Blue-eyed Hermit Crab

Blue-eyed Hermit Crab

Clibanarius corallinus

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Blueish Hermit Crab

Blueish Hermit Crab

Clibanarius englaucus

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Carnifex Hermit Crab

Carnifex Hermit Crab

Clibanarius carnifex

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Eurysternus Hermit Crab

Eurysternus Hermit Crab

Clibanarius eurysternus

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Lined Hermit Crab

Lined Hermit Crab

Clibanarius lineatus

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Red-stripe hermit crab

Red-stripe hermit crab

Clibanarius rutilus

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Stebbing's Hermit Crab

Stebbing's Hermit Crab

Clibanarius astathes

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Tricolor Hermit Crab

Tricolor Hermit Crab

Clibanarius sclopetarius

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Yellow-tipped Hermit Crab

Yellow-tipped Hermit Crab

Clibanarius virescens

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Zebra Hermit Crab

Zebra Hermit Crab

Clibanarius zebra

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Blood-spotted Hermit Crab

Blood-spotted Hermit Crab

Clibanarius cruentatus

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Blue-stripe Hermit Crab

Blue-stripe Hermit Crab

Clibanarius merguiensis

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Chapin's Hermit Crab

Chapin's Hermit Crab

Clibanarius chapini

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Ranson's hermit crab

Ranson's hermit crab

Clibanarius ransoni

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Antillean hermit crab

Antillean hermit crab

Clibanarius brasiliensis

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Recommended companions

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Similar care

Cards with similar requirements, difficulty, habitat, and husbandry profile.

Arethusa Hermit Crab

Arethusa Hermit Crab

Clibanarius arethusa

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Boschma's hermit crab

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Clibanarius boschmai

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Cook's hermit crab

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De Man's Hermit Crab

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Clibanarius demani

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Rosewater's Hermit Crab

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Clibanarius rosewateri

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Dwarf Zebra Hermit Crab

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Calcinus laevimanus

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Hidden Hermit Crab

Hidden Hermit Crab

Calcinus latens

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White hermit crab

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Calcinus minutus

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Danai's hermit crab

Danai's hermit crab

Clibanarius danai

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Double-striped hermit crab

Double-striped hermit crab

Clibanarius bistriatus

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Pacific Hermit Crab

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Clibanarius pacificus

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Striped-leg hermit crab

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Clibanarius rhabdodactylus

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White-fingered Hermit Crab

White-fingered Hermit Crab

Clibanarius albidigitus

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Mexican Hermit Crab

Mexican Hermit Crab

Clibanarius digueti

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Orange-banded hermit crab

Orange-banded hermit crab

Ciliopagurus strigatus

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West African hermit crab

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Clibanarius africanus

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Last updated: 06/30/2026