Due to convergent evolution [1], I'm not sure life that originated on an Earth-like planet would look completely different from Earth life, at least on a macroscopic level.
My point is that I think convergent evolution would be likely to produce “water blobs with heads, legs, and feet” on other Earth-like planets, i.e. planets with lots of liquid water and lots of solid land.
If you’re thinking of planets that are not similar to Earth, of course all bets are off.