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Colobocentrotus mertensi

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description Colobocentrotus mertensi Overview

Colobocentrotus mertensi is a sea urchin in the family Echinometridae found across the Indo-Pacific in wave-swept intertidal zones. Its morphology is highly modified for surviving violent surf: the test is flattened and its primary spines are short, broad, and overlapping, giving the animal a shingled, armor-like appearance. This streamlining reduces drag and impact damage where crashing waves meet rocky shores. It is one of the most anatomically specialized echinoids for high-energy shore environments.

help Colobocentrotus mertensi FAQ

What environment does the sea urchin *Colobocentrotus mertensi* live in?

*Colobocentrotus mertensi* is found across the Indo-Pacific in wave-swept intertidal zones. These harsh, violent surf environments require highly specialized adaptations for survival.

How is the body of *Colobocentrotus mertensi* adapted to survive crashing waves?

Its morphology is highly modified to survive violent surf, featuring a flattened test and short, broad, overlapping primary spines. This unique armor allows it to tightly cling to rocks while deflecting the immense pressure of crashing waves.

What family of sea urchins does *Colobocentrotus mertensi* belong to?

This species belongs to the family Echinometridae, a group of sea urchins known for their ability to bore into rocks and withstand high-energy coastal environments. The oval shape of their test is a common characteristic within this specific family.

What do the spines of *Colobocentrotus mertensi* look like?

Unlike the long, sharp spines of many familiar sea urchins, its primary spines are short, broad, and overlapping. This gives the urchin a distinct, shielded appearance that helps it maintain a low profile against the substrate.

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