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Seahorss are fish so, like all fish, they are vertebrates because they have a spine and spinal cord, and an internal skeleton. They belong to the Phylum Chordata.

Mammals, birds, fish, reptiles and amphibians are all vertebrates.

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6y ago
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6y ago

They have a spine, so they're vertebrates.

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Q: Is a seahorse vertebrate or invertebrate?
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