On my second visit to Blairgowrie to observe the Spider Crabs we were rewarded with thousands of the crustaceans gathering in the shallows below the pier to moult. No-one really knows why they come crawling into the waters below Blairgowrie Pier, but it is suspected to be a case of safety in numbers, as there are many predators that take advantage of the crabs when they’re in the process of growing a new shell. On our visit we only saw one large ray cruising, but there were plenty of reports of many more in the area, as well as small sharks and other predators.