WATCH: Sharks biting alligators, the most epic lion battles, and MUCH more. Enter your email in the box below to get the most mind-blowing animal stories and videos delivered directly to your inbox ...
An invertebrate is any animal without an internal backbone including insects, spiders, mollusks, crustaceans, and worms.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback