@simstr0ng I've not had any of my traps on my own lot the past week. My current family lives on the Admiral's Wreckage lot, the traps are all in the water near the fishing post there. I had some trouble placing the traps, don't know why, but the sim eventually succeded in placing the 4 traps I had.
@Frn0731 I've noticed if I forget to empty the traps for lets say 2 days, the fish will "escape" and I have to bait the traps again. Usually, when I empty/bait them every day, they are chock full of fish, treasure/trash.