SmallWhale

Crown-of-thorns Starfish

Meet the spiky starfish that eats coral, looking like a royal crown!

Images

A crown-of-thorns starfish on a reef in Fiji

A crown-of-thorns starfish on a reef in Fiji

openverse
Favia pallida (hard coral) with signs of bleaching or crown-of-thorns starfish damage
Red Crown of Thorns Starfish eating coral
crown-of-thorns starfish Acanthaster planci
Crown of thorns starfish
Crown of Thorns Starfish
Red Crown of Thorns Starfish eating coral on Ras Za'atar reef
crown-of-thorns starfish Acanthaster planci
Red Crown of Thorns Starfish eating coral
Crown of Thorns Starfish in coral
Crown of thorns starfish eating coral, Fiji
Crown of Thorns Starfish

Key Facts

Scientific Name
Acanthaster planci.
Habitat
Warm oceans with coral reefs.
Diet
Hard, stony coral polyps.
Size
Can be as wide as a dinner plate.
Fun Fact
Its spines look like a royal crown and are venomous.

Meet the Spiky Starfish!

Imagine a starfish, but super big and covered in sharp spikes! That's the crown-of-thorns starfish. It's one of the largest starfish in the world, sometimes as wide as a dinner plate. Its name comes from the pointy, venomous spines all over its back, which look like a crown made of thorns. These amazing creatures live in warm, sunny oceans where coral reefs grow.

What's for Dinner?

This starfish has a very special diet. It loves to eat coral! It uses its many arms to wrap around stony corals and then it sticks its stomach out to digest the coral polyps. Coral polyps are tiny animals that build the big coral reefs. So, the crown-of-thorns starfish is a predator that feeds on the builders of the reef. It's a bit like a giant eating tiny building blocks!

Where Do They Live?

You can find these spiky stars in warm oceans all around the world, from places like the Red Sea all the way to the Pacific Ocean. They especially love areas with lots of coral reefs. Think of them as living in underwater cities made of coral! They are most common in places like Australia, where the Great Barrier Reef is home to many of them.

A Starfish's Crown

The crown-of-thorns starfish got its name because its spiky back looks like the crown worn by kings and queens in old stories. These spikes aren't just for show; they are sharp and contain venom, which helps protect the starfish from other animals that might want to eat it. It's a tough defense for a tough-looking sea creature!

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