Bill Nye the Science Guy (1993)

S04E15 Invertebrates

Worms, squid, clams, and flies are creatures without spines. Fearless and resilient, these invertebrates thrive in various environments. You'll discover them in oceans, rivers, and on dry land. Remarkably, invertebrates outnumber their vertebrate counterparts by a factor of thirty, making them the predominant form of animal life on our planet.