Sealife guideThe thornback cowfishLactoria fornasini
Last updated on 09/18/2024 at 10:37 PM
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.
Geographic 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

Honeycomb cowfish
(Acanthostracion polygonium)

Reticulate boxfish
(Ostracion solorensis)

Scrawled cowfish
(Acanthostracion quadricornis)

Smooth trunkfish
(Rhinesomus triqueter)

Spotted boxfish
(Ostracion meleagris)

Spotted trunkfish
(Lactophrys bicaudalis)

Yellow boxfish
(Ostracion cubicus)
Discover also

Abudjubbe wrasse
(Cheilinus abudjubbe)

Cardinalfish
(Apogon imberbis)

Dwarf hawkfish
(Cirrhitichthys falco)

Fangtooth moray
(Enchelycore anatina)

Neon damselfish
(Pomacentrus coelestis)

Rusty parrotfish
(Scarus ferrugineus)

Saddled butterflyfish
(Chaetodon ephippium)

Titan triggerfish
(Balistoides viridescens)
The marine species from Indo-Pacific

Bigeye trevally
(Caranx sexfasciatus)

Blueface angelfish
(Pomacanthus xanthometopon)

Brownbanded bamboo shark
(Chiloscyllium punctatum)

Bumphead parrotfish
(Bolbometopon muricatum)

Emperor angelfish
(Pomacanthus imperator)

Lemonpeel angelfish
(Centropyge flavissima)

Pearl-scaled angelfish
(Centropyge vrolikii)
Our latestUpdates

Monday, August 3rd 2026
The olive ridley sea turtle
Discover the olive ridley sea turtle (Lepidochelys olivacea), the world's most abundant sea turtle, famous for its spectacular mass nesting events, wide tropical distribution, unique behavior, diet, reproduction, and conservation challenges.

Thursday, May 7th 2026
Faroe islands
Discover the Faroe islands, a remote archipelago between Iceland and Norway known for its dramatic cliffs, colorful villages, and untouched Nordic landscapes. Find travel tips, itineraries, hiking guides, local culture, and inspiration to explore this unique destination in the North Atlantic.

Wednesday, May 6th 2026
The short-finned pilot whale
Discover the tropical pilot whale (Globicephala macrorhynchus), a highly social large cetacean from tropical and subtropical waters, specialized in deep dives in search of squid.
Photo of the Day

Poulpe géant du nord du Pacifique
(Enteroctopus dofleini)