How Fast Is Tarantula Walking?

Tarantulas walk at just 0.5 km/h — about the same as a sloth. Their hydraulic leg system, powered by blood pressure rather than muscle, sets a fundamental limit: they cannot run fast without becoming entirely rigid.

Tarantulas walk on hydraulic legs powered by blood pressure — a clever, but inherently slow design.

• Same pace as a sloth
• Their hydraulic leg system can't move much faster