All year round, I think they tend to be larger during winter but I've always dived for them in summer and done reasonably well

 Wait for Little Johnny, he’s the occy guru.

Bang on the money.

 Thanks guys I might try my luck in a few weeks time when the water is a little more toasty 

 Theres a fair bit on net about occy lifecycles but local knowledge from the likes of the occy whisperer a.k.a little J , is also invaluable.

 I was surprised to learn that in 2016,  just the cockburn sound occy pro fishery alone took 24 tonnes , but it is under fisheries stewardship 

 so it must be you would hope , sustainable.

 They are quite good about it ( the occys that is) by appearing and growing mainly over our summer and autumn, when the waters bearable ,

 and then moving slightly deeper , laying eggs and dying off in the coldest time of the year , quite sporting of them really.

In years to come. If desallination plant increases salt content in Cockburn . I think that would be only thing to move them on .been swimming for them since primary school .Never seen decline.the only thing i see not making comeback in sound is crabs. Occy/ gummys have a ball on them. They are an amazing creature.( better eating / bait), I don't think you have any issues with them being sustainable . Seperateknob water gets no warmer from now on.quadfisher interesting about there eggs . Find dead occy ,look around area find hole thousands upon thousands of little egg pods ( shallow water). no dought some would have read about sharks going missing from an aquarium , occy from another aquarium in same room was leaving its tank to get a feed .( giant occy) Smart .very high in protein colestrial to no dought. In my books there vermin :)

 Quite strange creatures indeed. The female dies of starvation shortly after her brood hatches due to spending 100 percent of her time watching over her eggs. Within a few months after the male reaches sexual maturity it too dies. Scientists are puzzled as to why occy haven’t evolved to live longer since they’ve been around for around 300 million years. 

Female :) only joking.