Could be he's dead from the wound.

2 seconds sound clip from the Creature from the Black Lagoon (1954) movie soundboard.

You can hear this line at 00:44:32.161 in the Blu-ray version of the movie.

Quote context

[...]

- I don't want him creeping up on us while we're sleeping.

- I know a way to bring him up now: Rotenone. It's a drug which natives make from roots for catching fish in still waters. Sometimes I catch fish that way. I show you. Look.

- One taste of the poison water, and poof! The paralyzed fish floats up to the top with a big hangover.

- Come on! Let's try it.

- Still no sign.

- Nothing but the little ones so far.

- Could be he's dead from the wound.

- Then again, maybe the rotenone isn't going deep enough.

- Maybe we should fix the rotenone to sink deeper down, eh?

- Yeah. Anything is worth a try.

- What was that?

- I don't know.

- Come on. Come on.

[...]