Is a sea turtle a vertebrate or invertebrate?

A sea turtle is a vertebrate, just like any other turtle. Their spine is connected to the roof of the inside of their shell, which is why they can swap shells or get out of the ones they were born with, or it will kill it.

No. The sea turtle belongs to the reptile group. Reptiles are chordates, also known as vertebrates.

A vertebrate. After all, it has a spine.