Dryden has several little gems like this that are easy to pass by unnoticed. What a great place to put a cache! The coordinates take you to the sign describing the project that brought all these little painted fish to this otherwise less-than aesthetically pleasing area. There are 100 fish, although some need to be put back in place as their zip ties have bitten the dust.
To find the cache you must find the right fish. The container is hidden behind it, but there is no need to remove the fish, nor does this cache require climbing the fence. The hint is in the name.