Vertebrates.
can't believe i still have to say this in this year of 2023, but it is so g r o s s that vertebrates still exist, i hate all vertebrates, backbones are disgusting (thinking about them makes me want to throw up!), i take SPINE and U and put them together to get SUPINE and that's the only way i like spine because i can lay supine without a stupid bone tube for my nerve bundle. maybe you should have taken the time it took you to grow an axial endoskeleton and grown a life instead b**ch