the crabs are still around mandurah , if you are chasing them and launch at the coodanup (think thats how its spelt ) be aware both sides of the newish  ramp  has dirty great holes about 500mm deep about 3 meters in to the water 1 wheel on a trailer will disapear in the holes leaving your trailer on a buggered angle making it hard to get your boat back on the trailer straight use the older side of the ramp