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.
A thornback cowfish hiding in the sea grass with its patterned skin and boxy body
A thornback cowfish hiding in the sea grass with its patterned skin and boxy body ©  | Dreamstime.com
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)
Honeycomb cowfish
(Acanthostracion polygonium)
Reticulate boxfish (Ostracion solorensis)
Reticulate boxfish
(Ostracion solorensis)
Scrawled cowfish (Acanthostracion quadricornis)
Scrawled cowfish
(Acanthostracion quadricornis)
Smooth trunkfish (Rhinesomus triqueter)
Smooth trunkfish
(Rhinesomus triqueter)
Spotted boxfish (Ostracion meleagris)
Spotted boxfish
(Ostracion meleagris)
Spotted trunkfish (Lactophrys bicaudalis)
Spotted trunkfish
(Lactophrys bicaudalis)
Yellow boxfish (Ostracion cubicus)
Yellow boxfish
(Ostracion cubicus)
Discover also
Bar jack (Caranx ruber)
Bar jack
(Caranx ruber)
Eschmeyer's scorpionfish (Rhinopias eschmeyeri)
Eschmeyer's scorpionfish
(Rhinopias eschmeyeri)
Fourhorn poacher (Hypsagonus quadricornis)
Fourhorn poacher
(Hypsagonus quadricornis)
Mangrove red snapper (Lutjanus argentimaculatus)
Mangrove red snapper
(Lutjanus argentimaculatus)
Seaweed blenny (Parablennius marmoreus)
Seaweed blenny
(Parablennius marmoreus)
Spangled emperor (Lethrinus nebulosus)
Spangled emperor
(Lethrinus nebulosus)
Splendid toadfish (Sanopus splendidus)
Splendid toadfish
(Sanopus splendidus)
Tailspot squirrelfish (Sargocentron caudimaculatum)
Tailspot squirrelfish
(Sargocentron caudimaculatum)
The marine species in the Indo-Pacific
Blue tunicate (Rhopalaea fusca)
Blue tunicate
(Rhopalaea fusca)
Bobbitt worm (Eunice aphroditois)
Bobbitt worm
(Eunice aphroditois)
Crown of thorns starfish (Acanthaster planci)
Crown of thorns starfish
(Acanthaster planci)
Emperor angelfish (Pomacanthus imperator)
Emperor angelfish
(Pomacanthus imperator)
Honeycomb filefish (Cantherhines pardalis)
Honeycomb filefish
(Cantherhines pardalis)
Horned sea star (Protoreaster nodosus)
Horned sea star
(Protoreaster nodosus)
Immaculate pufferfish (Arothron immaculatus)
Immaculate pufferfish
(Arothron immaculatus)
Lemonpeel angelfish (Centropyge flavissima)
Lemonpeel angelfish
(Centropyge flavissima)

Our latestUpdates

The reticulated sandperch
Thursday, September 10th 2026
The reticulated sandperch
Discover the reticulated sandperch (Parapercis tetracantha), a small Indo-Pacific fish known for its elongated body and distinctive brown and white pattern.
The wedgetail triggerfish
Monday, September 7th 2026
The wedgetail triggerfish
Discover the wedgetail triggerfish, Hawaii's famous state fish. Learn about its vibrant colors, coral reef habitat, unique behavior, and cultural significance in Hawaii.
The Kemp's ridley sea turtle
Saturday, September 5th 2026
The Kemp's ridley sea turtle
The Kemp's ridley sea turtle is the smallest of the seven species of sea turtles and one of the most endangered. Discover this fascinating species, its unique biological characteristics, and its remarkable mass nesting behavior known as an arribada, when thousands of females gather on beaches to lay their eggs.
Photo of the Day
Ptérois nain (Dendrochirus brachypterus)
Ptérois nain
(Dendrochirus brachypterus)