Puddingwife wrasse
Halichoeres radiatus
A dramatic large wrasse from the Western Atlantic, famed for its stunning color transformations from juvenile to adult, requiring spacious setups with deep sand beds.
Water Temperature
22 - 26 °C
pH Value
8.1 - 8.4
Water type
Marine
Tank level
Bottom and middle
Adult size
40 cm
Minimum tank volume
>= 600 L
Minimum group
>= 1
Species description
Geographical Origin and Habitat:
Halichoeres radiatus is distributed in the Western Atlantic, from Bermuda and the Gulf of Mexico to Brazil. It inhabits outer coral reefs and sandy lagoons down to 50 meters deep.
Taxonomy and Morphology:
Belongs to the Labridae family. It is one of the larger wrasses, reaching 30 cm in captivity (and more in the wild). Features a robust body with strong teeth adapted for crushing shells.
Social Behavior:
An active, diurnal, and territorial fish. It demands significant swimming space and shows aggression towards conspecifics. It regularly flips small rocks to find food.
Coloration and Sexual Dimorphism:
Juveniles are bright yellow with black and white spots. Adults develop greenish or blue-green tones with orange striping and iridescent lines on the head.
Care, breeding and tankmates
Aquarium Setup:
Needs a very large marine aquarium of at least 500-600 liters. Provide a deep layer of fine sand (at least 8-10 cm) free of sharp edges for burrowing.
Diet and Feeding:
Voracious carnivore. Feed whole unpeeled shrimp, clam meat, mussels, frozen krill, and large protein pellets. Feed two or three times daily.
Water Quality:
Requires powerful filtration and an oversized skimmer to handle the bio-load. Maintain temperature 22-27 °C, pH 8.1-8.4, and specific gravity 1.020-1.025.
Compatibility and Cohabitation:
Absolutely not reef safe with invertebrates: it will eat snails, crabs, hermit crabs, and shrimp. Compatible with large fish like tangs and large angelfish.
Aquarium Breeding:
Protogynous hermaphrodite. Breeding in home aquariums is not possible due to its size and water column spawning requirements.
Risks and Diseases:
Main risks include skin lesions from burrowing in coarse substrate and jump escapes. Cover the tank with a heavy and secure lid.
Geographic Origin and Distribution
Halichoeres radiatus is distributed in the Western Atlantic, from Bermuda and the Gulf of Mexico to Brazil. It inhabits outer coral reefs and sandy lagoons down to 50 meters deep.
Origin
Tropical oceans and reefsExtra-Amazon South AmericaCentral America and CaribbeanNorth America
Fish profile
- Temperament
- Aggressive
- Puddingwife wrasses are outgoing, bold, and sometimes mischievous inhabitants. They are known to flip over small rocks and corals in their ceaseless hunt for food. They often learn to recognize their caretaker and may beg for food when approached.
- Diet
- Carnivore
- This species is a voracious carnivore that feeds on a wide array of benthic invertebrates. Its diet should consist of chopped meaty seafoods, such as squid, shrimp, and clams, supplemented with high-quality marine pellets. Providing hard-shelled prey occasionally helps wear down their constantly growing teeth.
- Life expectancy
- 6-8 years
- In a large, well-managed, and mature marine aquarium, this species has an average life expectancy ranging between 6 and 8 years, occasionally reaching or exceeding 10 years under exceptional husbandry conditions. Being one of the largest members of the genus Halichoeres, which in the wild can reach 45-50 centimeters in length (although in captivity it tends to stabilize at smaller sizes, around 25-30 centimeters), long-term maintenance requires rigorous planning. Its longevity is closely linked to the availability of space for free swimming and the presence of a fine, deep sand substrate at least 8-10 centimeters deep, in which the fish can bury itself during the night to sleep or to escape sources of severe stress. Powerful filtration and regular water changes are necessary to manage the organic load generated by such an active and voracious species. From a dietary standpoint, it requires frequent and varied feedings of fresh or frozen protein-rich foods, such as mysis, krill, shrimp pulp, and chopped clams. It is a natural predator of small invertebrates, crustaceans, and mollusks, which is why it is not considered reef-safe for aquariums with ornamental invertebrates.
- Adult size
- 40 cm
- The catalog's scalar value is 40 cm. The FishBase SPECIES table (v25.04 snapshot) source reports a maximum adult measurement of 51 cm for this species, recorded as total length (TL). The taxonomic record consulted is Halichoeres radiatus (v25.04); male or unsexed record. These figures are not interchangeable: the first is the profile's editorial reference, whereas the second is a published maximum under a specific measurement convention; differences among sources can reflect sex, population, life stage and measuring method.
- Sex ratio
- Solitary
- Due to their size and territorial nature as adults, keeping a single specimen per aquarium is advisable. Males are intolerant of each other and will fight relentlessly in confined spaces. A harem structure requires a massive aquarium and is generally best left to public aquaria.
- Feeding frequency
- 2-3 times daily
- They possess a rapid metabolism and should be fed two to three times daily. Generous portions are required to sustain their growth and energetic swimming behavior. Without adequate nutrition, they may begin to pick heavily at beneficial organisms within the aquarium.
- Bioload
- The Puddingwife wrasse has a substantial bioload as it grows to a fairly large size. High-quality mechanical and biological filtration is necessary to manage its waste production. A large protein skimmer is highly recommended to maintain excellent water quality.
- Flow
- Strong
- Strong, turbulent water movement is preferred to mimic the shallow coastal reefs and seagrass beds they inhabit. Excellent water circulation keeps the environment adequately oxygenated for their active lifestyle. They often ride the currents while surveying the substrate for potential meals.
- Jump risk
- Yes
- This fish presents a significant jump risk, particularly when introduced to a new environment. A secure, weighted, or tightly fitted canopy is mandatory to keep them safely contained. Even small gaps around filters or plumbing should be sealed, as they are adept at finding escape routes.
- Reproduction
- Oviparous
- Captive reproduction of the Puddingwife wrasse is virtually undocumented in home aquariums. They exhibit pelagic spawning, scattering their eggs in the open ocean currents. The larval stage is prolonged and requires complex, live microscopic foods that are impractical for most hobbyists to provide.
- Compatibility & tankmates
- Not reef safe
- While relatively peaceful as a juvenile, this species becomes more boisterous and potentially aggressive as it matures. It is not considered safe for reef tanks with ornamental crustaceans or small delicate mollusks. It does best in a fish-only with live rock (FOWLR) setup alongside similarly robust tank mates.
- Tank level
- Middle/Bottom
- They are highly active swimmers that utilize all levels of the aquarium, though they focus their foraging on the bottom. A deep sand bed is absolutely crucial, as they bury themselves completely to sleep and hide. Adequate swimming space above the substrate is also essential for their well-being.
Scientific Parameters & Models
FishBase
Window to the official scientific data of the species
Data synced on: 06/15/2026
- Trophic level
- 3.5 ± 0.1 se
- Resilience
- Medium (1.4 - 4.4 years)
- Phylogenetic uniqueness (PD50)
- 0.5
- Bayesian Length-Weight
- a = 0.01, b = 3.09
- VulnerabilityModerate vulnerability (40 / 100)
Image gallery
Licensed images linked to the species or, when marked, to the closest representative taxon.
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