Sealife guideThe thornback cowfishLactoria fornasini
Taxonomy
Description
The thornback cowfish has a box-shaped body that resembles a chest. It is distinguished by its long spines located on its head above its eyes, as well as on the dorsal and posterior parts of its body.
The thornback cowfish displays a yellowish to greenish coloration with irregular patterns of bluish or brown spots and lines across its body.
Range
The thornback cowfish is found throughout the tropical Indo-Pacific, especially in the Bali sea, from east Africa to the Bass islands.
Habitat
The thornback cowfish lives in coral reefs and seagrass beds, where it easily hides thanks to its patterns
Did you know ?
The thornback cowfish is a poisonous species of boxfish. Indeed, when stressed or threatened, it secretes toxins as a means of defense against predators
Unlike other fish, the boxfish’s body is covered with a rigid shell made of bony plates, which protects it like armor from predators but also limits its body movements. As a result, the boxfish moves more slowly by undulating its dorsal and anal fins.
Within the same family

Scrawled cowfish
(Acanthostracion quadricornis)

Yellow boxfish
(Ostracion cubicus)

Smooth trunkfish
(Rhinesomus triqueter)

Honeycomb cowfish
(Acanthostracion polygonium)

Spotted boxfish
(Ostracion meleagris)

Reticulate boxfish
(Ostracion solorensis)

Spotted trunkfish
(Lactophrys bicaudalis)
Explore also

Oriental sweetlips
(Plectorhinchus vittatus)

Pontoh's pygmy seahorse
(Hippocampus pontohi)

Peacock razorfish
(Iniistius pavo)

Black grouper
(Mycteroperca bonaci)

Bluering angelfish
(Pomacanthus annularis)

Arabian angelfish
(Pomacanthus asfur)

Emperor angelfish
(Pomacanthus imperator)

Redband parrotfish
(Sparisoma aurofrenatum)
The marine species from Indo-Pacific

Bicolor angelfish
(Centropyge bicolor)

Bigeye trevally
(Caranx sexfasciatus)

Blue tunicate
(Rhopalaea fusca)

Brownbanded bamboo shark
(Chiloscyllium punctatum)

Copperbanded butterfly
(Chelmon rostratus)

Lemonpeel angelfish
(Centropyge flavissima)

Persian carpet flatworm
(Pseudobiceros bedfordi)

Thornback cowfish
(Lactoria fornasini)
Our latestUpdates

Wednesday, July 9th 2025
Fort Lauderdale, the Venice of America
Located just 28 miles north of Miami, the city of Fort Lauderdale is a chic yet laid-back destination, nicknamed the Venice of America thanks to its 310 miles of navigable canals. This coastal city, long overshadowed by its southern neighbor, is now emerging as a must-visit spot in South Florida, combining white-sand beaches, refined lifestyle and lush natural surroundings.

Tuesday, July 8th 2025
The big skate
The big skate is one of the largest species of its genus and one of the most distinctive skates along the northeastern Pacific coast. This bottom-dwelling species is easily recognized by two large, dark eyespots on its dorsal surface that resemble prominent eyes.

Monday, May 5th 2025
The California spiny lobster
The California spiny lobster has an elongated body and a hard exoskeleton, usually brown in color with yellow or orange patterns. The California spiny lobster inhabits the temperate waters along the eastern coast of the Pacific Ocean, particularly those of California and the Gulf of California.
Photo of the Day

Poisson coffre réticulé
(Ostracion solorensis)