Painfully close but wrong. Big fish are almost always eaten by small fish. On the other hand, almost all small fish fail. It's the rare exception among small fish that bests a big fish. Stated correctly it sounds unremarkable because it is unremarkable. So much for "Leslie's Law". His DEC/IBM comparison shows that he somehow stopped reading the tech press around 1990. Intel's decomposed platform ate them all and open…
Big fish are almost always eaten by small fish. Small fish are almost always eaten by big fish. At least there's a nice symmetry to it.
So to rephrase what you're saying: fish that get eaten are eaten by other fish. Not quite as interesting.