Problems at the gas pump in Ca.

Welcome to the 70's. Looks like an anti-siphon device of some sort. Leave it to Cudachick to point out a flow issue.

So I'm thinking about what you said about the vent tube and I decide to go outside and take a peek down the filler tube with a small flashlight..and low and behold..I see something stuck half way down the pipe? Apparently my fish swallowed a foreign object. I go into my closet and make a small hook out of a wire coat hangar and fish this out.
Anyone know what it is? It doesn't appear to be anything automotive but I could be wrong.