How are seahorses invertebrates?

An invertebrate is an animal without a backbone, whereas a vertebrate has a spine. Some 98 percent of the known animal kingdom is made up of invertebrates, with the vertebrates -- mammals, reptiles and bony fish -- comprising the rest. read more

An invertebrate is an animal without a backbone, whereas a vertebrate has a spine. Some 98 percent of the known animal kingdom is made up of invertebrates, with the vertebrates -- mammals, reptiles and bony fish -- comprising the rest. Seahorse Anatomy. The seahorse is a vertebrate of the scientific phylum Chordata. read more

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No, seahorses are vertebrates, because they have a spine. Creatures with spines are classed as vertebrates. Creatures with no spines are classed as invertebrates. Seahorses are fish which are closely related to pipefish. read more