Nothing but land crabs.

2 seconds sound clip from the Attack of the Crab Monsters (1957) movie soundboard.

You can hear this line at 00:18:13.216 in the DVD version of the movie.

Quote context

[...]

- Land crabs and seagulls. Everything else is dead.

- Dale! Martha!

- What's the matter, Carson?

- Come up the path, we'll meet you.

- They must have found something. Come on, honey.

- Oh, hold it. That ridge will drop right off.

- Off what?

- Come, see for yourself.

- But only this morning I came along this path on my way to the beach.

- And it wasn't there.

- You mean this pit wasn't here before?

- It has only appeared in the last 20 minutes.

- And it's at least 50 feet deep.

- Nothing but land crabs.

- I want to go down there.

- No.

- Why not?

- You are a geologist. You know that a second disturbance would cause a cave-in that would crush anybody down in the pit.

- He seems pretty definite, Jim.

- Is he right about a cave-in?

- He could be, assuming this was caused by a disturbance.

- Why, it's glazed as though it had been fired in a kiln.

[...]