When we first visited Tangier, we were greeted at the Park's Marina by about 50 cats, all fed by the owner. At some point, someone had a problem with this state of affairs, and the town’s leaders brought in a SWAT team of veterinarians to spay and neuter their increasingly out-of-control cat militia. Unfortunately, they hadn't done all of the math.
Now the otters have the upper hand, stealing soft crabs so conveniently placed in shedding tanks, available nightly under convinient work lighting.
Some of the waterman have gone back to keeping cats on their shedding platforms. Though a cat is no match for an otter, a group of cats is sufficient deterrent.
I suspect we'll see more cats during our next visit.