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No they are vertebrates and chordates.
invertebrates or non-chordates
Invertebrates have no vertebral column
Vertebrates (like humans) have a backbone. Invertebrates (like worms) lack a backbone.
Invertebrates are animals without a backbone. Some types of invertebrates are worms, sponges, jellyfish and spiders.
The phylum Chordata is defined by four characteristic traits: Pharyngeal gill slits, a notochord, a dorsal hollow nerve cord, and a muscular post-anal tail. There are three subphyla of Chordates: Urochordata, Cephalochordata, and Vertebrates. So it depends on what species you are dealing with if you are looking at specifics. But a spine is not a characteristic of all chordates.
all vertebrates have endoskeleton but not all invertebrates do
phyllum chordata includes organisms which are both vertebrates and invertebrates. thus, we can say that all vertebrates can be chordates but all chordates cannot be vertebrates.
One characteristic shared by all chordates is the presence of a notochord, a flexible rod that provides structural support. Humans, being classified under the phylum Chordata, possess a notochord during their embryonic development that eventually develops into the spinal column.
Protozoans are unicellular and microscopic invertebrates are multicellular
invertebrates all lack a backbone but besides that not many similarities.