BSAC jetty dive. This mature PJS came to investigate us from somewhere well north of the jetty and put on quite a performance, going well up the water column and doing loops and so on. Possibly agitated and in a sort of territorial protective mode, hard to say. I suppose 4 divers in a fairly close group might be considered a threat, especially as the breeding season begins on the nearby reefs. Probably less relevant were the few crab nets lying flat on the bottom, because the dodge tide seemed to have made the target crab species rather scarce (although they might be overfished at this very popular recreational fishers site, but who knows?)