Common name: Longhorn Cowfish

Scientific name: Lactoria cornuta (Linnaeus, 1758)

General Information

The Longhorn Cowfish, scientifically known as Lactoria cornuta, is a fascinating and unique species that captures the imagination of many aquarium enthusiasts. With its distinct horn-like protrusions on the head and tail, this species stands out in any aquatic setup. Its bright yellow color with white spots adds to its allure, making it a sought-after species in the marine aquarium trade.

While it is a captivating addition to a tank, the Longhorn Cowfish requires special consideration due to its potential size and specific care needs. Its unique body shape and coloration make it a favorite among aquarists looking for something out of the ordinary.

Details

Estimated price
Moderate
Recommended minimum tank volume
300 liter (79 gallons)
Salinity
S.G. 1.020 to 1.025
Temperature
24 to 28 °C (75 to 82 °F)
Acidity
pH 8 to 8.5
Average size
50 cm (1′8″)
Care level
Moderate to difficult
Diet
Omnivore Feeds on algae, invertebrates, and detritus in the wild
Social
Solo Best kept solo due to territorial behavior and potential toxin release
Reefsafe
No Known to nibble on corals and invertebrates
Aggression
Semi aggresive Can be semi-aggressive if space is limited or stressed
Captive bred
No
IUCN Red List
EX
EW
CR
EN
VU
NT
LC

Taxonomy

  1. Kingdom
    Animals
    Animalia
  2. Phylum
    Chordates
    Chordata
  3. Class
    Ray-finned Fishes
    Actinopterygii
  4. Order
    Pufferfish
    Tetraodontiformes
  5. Family
    Boxfish
    Ostraciidae
  6. Genus
    Cowfish
    Lactoria
  7. Species
    Longhorn Cowfish
    Lactoria cornuta (Linnaeus, 1758)
  8. Synonyms
    Ostracion cornutus Linnaeus, 1758
    Ostracion horridus Desjardins, 1836
  9. Source: GBIF | Global Biodiversity Information Facility

Care

Caring for a Longhorn Cowfish can be moderately challenging due to its size and specific environmental needs. It thrives in a spacious aquarium with plenty of swimming space and a well-maintained environment. The tank should include live rock and ample hiding spots to mimic its natural habitat.

This species is sensitive to poor water quality, so regular maintenance and monitoring are crucial. A high-quality filtration system is essential to maintain optimal water conditions.

Diet and Feeding

Longhorn Cowfish are omnivorous, feeding on a variety of foods in the wild, including algae, small invertebrates, and detritus. In captivity, they should be offered a varied diet that includes marine-based pellets, frozen foods like brine shrimp and mysis shrimp, and occasional vegetable matter.

Feeding should be done once or twice a day, ensuring that the food is small enough for them to consume easily. Monitor their feeding habits to ensure they are eating well and adjust portions as necessary.

Behavior and Compatibility

The Longhorn Cowfish is generally peaceful, but it can be semi-aggressive towards other tank mates, especially if space is limited. It's best kept in a species-only tank or with other peaceful fish that won't outcompete it for food.

They are known to nibble on corals and invertebrates, so caution is advised when housing them in a reef setup.

Health and Common Issues

Longhorn Cowfish are susceptible to stress and poor water conditions, which can lead to health issues. They can release a toxic substance called ostracitoxin when stressed or threatened, which can be harmful to other tank inhabitants.

To ensure their health, maintain stable water conditions and provide a stress-free environment. Regular health checks and monitoring for signs of illness are essential.

Habitat

In the wild, Longhorn Cowfish are found in shallow reef environments and seagrass beds throughout the Indo-Pacific region. They prefer warm, stable waters with plenty of hiding spots and areas to forage for food. Replicating these conditions in captivity will help them thrive.