Echinoderms are the only invertebrate group of deuterostomes - . Echinoderm comes from echino- , meaning "spiny, and -oerm, meaning "skin." Most echinoderms have some type of spine embedded in their skin. For some species, such as the sea urchin, these spines are very large, but. for other species, such as the starfish, these spines may be very small. Acanthaster planci, also known as the crown-of-thorns starfish, is a Iarge venomous echinoderm. These starfish live on coral reefs in the Pacific Ocean, Indian Ocean, and Red Sea. They are predators that feed on the living polyps of corals. In the last few decades, populations of these starfish have gone up dramatically, and they have subsequently caused a lot of damage to fragile coral reef ecosystems. A single crown-of-thorns starfish can destroy up to 6 square meters ( 65 square feet) of living coral reef in a single yeac.Like all starfish, the crown-of-thorns starfish is symmetrical as an aduit but develops from a symmetrical larve. It senses its surrounding environment throuah the help of eyespots at the tips of its arms, and it responds to this sensation through signals sent. The crown- of-thorns starfish moves across the coral reef seeking new prey through the use ofWaterFrame / Alamy Like all starfish, the crown-of-thorns starfish is symmetrical as an adult but develops from a symmetrical larva. It senses its surrounding environment throuah the help of eyespots at the tips of its arms, and it responds to this sensation through signals sent. The crown-of-thorns starfish moves across the coral reef seeking new prey through the use ofWaterFrame / Alamy begin{tabular}{|c|} hline from its ossicles from its decentralized nervous system from its brain symmetrical as an adult but develops from a ish is ghe help of eyespots at the tips of its agms and responds to this sensation ithiough signals sert end{tabular} The crown-of-thoms starfish moves across the coral reef seeking new prey through the use ofWaterFrame / Alamy f-thorns starfish is symmetrical as an adult but develops from a symmetrical larva. it onment through the help of eyespots at the tips of its arms, and it responds to this sensation through signals sent . The crown- of-thorns starfish moves across the coral reef seeking new prey through the use of.

1. Echinoderms are the only invertebrate group of deuterostomes - . Echinoderm comes from echino-
, meaning "spiny, and -oerm, meaning "skin." Most echinoderms have some type of spine
embedded in their skin. For some species, such as the sea urchin, these spines are very large,
but. for other species, such as the starfish, these spines may be very small. Acanthaster planci,
also known as the crown-of-thorns starfish, is a Iarge venomous echinoderm. These starfish live
on coral reefs in the Pacific Ocean, Indian Ocean, and Red Sea. They are predators that feed on
the living polyps of corals. In the last few decades, populations of these starfish have gone up
dramatically, and they have subsequently caused a lot of damage to fragile coral reef ecosystems.
A single crown-of-thorns starfish can destroy up to 6 square meters ( 65 square feet) of living coral
reef in a single yeac.Like all starfish, the crown-of-thorns starfish is symmetrical as an aduit but
develops from a symmetrical larve. It senses its surrounding environment throuah the help of
eyespots at the tips of its arms, and it responds to this sensation through signals sent. The crown-
of-thorns starfish moves across the coral reef seeking new prey through the use ofWaterFrame /
Alamy Like all starfish, the crown-of-thorns starfish is symmetrical as an adult but develops from a
symmetrical larva. It senses its surrounding environment throuah the help of eyespots at the tips of
its arms, and it responds to this sensation through signals sent. The crown-of-thorns starfish
moves across the coral reef seeking new prey through the use ofWaterFrame / Alamy
begin{tabular}{|c|} hline from its ossicles from its decentralized nervous system from its brain
symmetrical as an adult but develops from a ish is ghe help of eyespots at the tips of its agms and
responds to this sensation ithiough signals sert end{tabular} The crown-of-thoms starfish moves
across the coral reef seeking new prey through the use ofWaterFrame / Alamy f-thorns starfish is
symmetrical as an adult but develops from a symmetrical larva. it onment through the help of
eyespots at the tips of its arms, and it responds to this sensation through signals sent . The crown-
of-thorns starfish moves across the coral reef seeking new prey through the use of