Whyalla's Circular Jetty is an interestesting construction just to see but this is also a great spot for fishing. Test your luck during the day or go at night and use the LED lights from above that lure squid in. Keep an eye out for the Giant Cuttlefish as this area is known for receiving around 250,000 giant cuttlefish during the winter. You can go snorkeling, where 3 meters depth is best. With water temperetures of 16 degrees., you will need a wetsuit. Alternatively, a bottom glass boat tour offers the same experience with a birds eye view and you stay dry.