Convergent evolution means that different species have evolved to do the same sort of thing. Those two animals show convergent evolution. Convergent evolution explains why they look so much alike.

Convergent evolution, or convergence theory.

2 examples of convergent evolution among caminacules

Evolution is the general theory itself, by which organisms change and adapt over time. Convergent evolution is a specific proces in which similar traits appear in unrelated organisms. For example, insects and birds both have wings but the two evolved independent of each other. That's convergent evolution.

convergent evolution