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Anker's Cleaner Shrimp

Lysmata ankeri

Anker's Cleaner Shrimp is a Western Atlantic peppermint shrimp species. It is highly popular among aquarists for controlling pest Aiptasia anemones.

Taxonomy
Class:Malacostraca
Order:Decapoda
Family:Lysmatidae
Genus:Lysmata
Species:Lysmata ankeri

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Water Temperature

22 - 27 °C

pH Value

8.1 - 8.4

Water type

Marine

Invertebrate type

Marine shrimp

Adult size

4.5 cm

Minimum group

>= 1

KH

8 - 12 dKH

Ecological role

Cleaner

Species description

Geographical Origin and Habitat: Western Atlantic: distributed from Florida and the Caribbean islands down to southern Brazil. It inhabits shallow coral reefs, rocky crevices, and seagrass beds, frequently seeking shelter under large sponges, rocks, or corals to avoid direct sunlight.
Taxonomy: Belongs to the family Lysmatidae (formerly Hippolytidae), genus Lysmata. It is distinguished by its modest size, reaching an adult length of 4 to 5 cm, and its delicate pincers and antennae which are used for tactile communication and cleaning activities.
Social Behavior: Gregarious and peaceful species, primarily active during twilight and nighttime. It behaves as a facultative cleaner shrimp, performing parasite removal on cooperative fish. It plays a key ecological role as a scavenger, consuming organic waste.
Coloration and Sexual Dimorphism: Semi-translucent body marked with distinct red-orange longitudinal and transverse stripes. Internal organs may show olive-green or yellowish tints. The species is a simultaneous hermaphrodite, meaning mature individuals function as both males and females.

Care, breeding and tankmates

Tank Setup: Requires a reef or nano-reef tank of at least 50 liters (approx. 13 gallons). Providing plenty of live rock with dark caves, crevices, and overhangs is crucial, as the shrimp needs to hide during the daytime to feel secure.
Diet and Feeding: Omnivorous scavenger. Will readily consume leftover fish foods, mysis shrimp, brine shrimp, and sinking pellets. It is widely valued by aquarists for its ability to hunt and consume small Aiptasia (glass anemones) in the aquarium.
Water Quality: Keep parameters stable: temperature 22-27°C (72-80°F), pH 8.1-8.4, and specific gravity 1.023-1.025. Absolute zero tolerance for copper-based medications, which are lethal to invertebrates. Monitor iodine levels, as iodine is essential for proper molting.
Compatibility and Tankmates: 100% reef-safe. Compatible with peaceful community fish and other non-predatory invertebrates. Do not house with crustacean predators such as puffers, hawkfish, groupers, or large wrasses, which will quickly consume them.
Aquarium Breeding: Although pairs spawn regularly and carry green eggs beneath their pleopods, raising the larvae in a home aquarium is highly challenging due to a prolonged planktonic larval phase and the risk of larvae being drawn into mechanical filters.
Risks and Diseases: Highly vulnerable during and immediately after molting when its new exoskeleton is still soft. It will hide for a few days during this period. Extremely sensitive to osmotic shock; slow drip-acclimatization is required.

Geographic Origin and Distribution

Western Atlantic: distributed from Florida and the Caribbean islands down to southern Brazil. It inhabits shallow coral reefs, rocky crevices, and seagrass beds, frequently seeking shelter under large sponges, rocks, or corals to avoid direct sunlight.

Origin

Tropical oceans and reefsExtra-Amazon South AmericaCentral America and CaribbeanNorth America

Invertebrate profile

Diet
Omnivore
Omnivorous scavenger. Accepts flakes and frozen foods.
Ecological role
Cleaner
Excellent nocturnal scavenger.
Shock sensitivity
High
Requires stable reef parameters.
Calcium and minerals
High
Requires trace elements and calcium to molt.
Molting
Periodic
Molting is a vital yet perilous phase for their growth. Once the old shell is shed, the shrimp is soft and defenseless. It is crucial to provide intricate live rock with dark caves where they can safely retreat for several days until their new exoskeleton absorbs enough minerals to harden.
Reproduction
Oviparous
These shrimp are protandric simultaneous hermaphrodites, meaning they mature as males before developing female reproductive capabilities. Mating occurs right after molting. They regularly produce pelagic larvae, but successfully raising them in captivity is notoriously difficult, requiring specialized kreisel tanks and a constant supply of microscopic planktonic live foods.
Compatibility & tankmates
Reef safe
They are generally peaceful and reef-safe when given ample space and rockwork. However, overcrowding them can lead to territorial disputes and cannibalism, particularly targeting freshly molted shrimp. Unlike the closely related wurdemanni species, their appetite for consuming pest Aiptasia anemones is poorly documented and largely inconsistent in home aquariums.

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

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Grabham's cleaner shrimp

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Lysmata grabhami

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Lipke's Cleaner Shrimp

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Ternate cleaner shrimp

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Anchisteus Cleaner Shrimp

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Boggess' Peppermint Shrimp

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Kuekenthal's cleaner shrimp

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Lined Shrimp

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Peppermint Shrimp var. multiscissa

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Lysmata multiscissa

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Slender-billed cleaner shrimp

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Lysmata gracilirostris

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Splendid Cleaner Shrimp

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Bahia Cleaner Shrimp

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Lysmata prima shrimp

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Lysmata

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Udo's Peppermint Shrimp

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Lysmata udoi

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Nayarit Peppermint Shrimp

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Lysmata nayaritensis

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Rathbun's Peppermint Shrimp

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Lysmata rathbunae

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Malagasy cleaner shrimp

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Lysmata malagasy

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Last updated: 06/30/2026
Anker's Cleaner Shrimp (Lysmata ankeri) Care Guide & Tank Setup | Atlarium