catch and release, and Sydney has some of the deadliest spiders in the world ... like the Sydney Funnel Web
"Funnel-webs are probably one of the three most dangerous spiders in the world and are regarded by some to be the most dangerous.[1]
Examination of bite records seems to indicate that wandering males have caused a large majority of fatal bites to humans, however this has not been proven. Males, recognised by the modified terminal segment of the palp, are aggressive and tend to wander during the warmer months of the year looking for receptive females of their kind for mating.[2] They are attracted to water and hence are often found in swimming pools where they have fallen while wandering. They also show up in garages and yards in suburban Sydney.
While some very venomous spiders may give dry bites, these spiders do so much less frequently. It appears that approximately 10% to 25% of bites will produce toxicity[1] but the likelihood cannot be predicted and all should be treated as potentially life-threatening.
There have been 26 recorded deaths in Australia in the last 100 years from spider bites. Bites from funnel web spiders have caused 13 deaths (seven in children)[1]. In all cases where the sex of the biting spider could be determined, it was found to be the male of the species.[3] Most victims were young, ill or infirm. Members of the genus Hadronyche may also cause fatal envenomations although none have been recorded. Assays of venom from several Hadronyche species have shown it to be similar to Atrax venom."
http://en.wikipedia.org/wiki/Austral...nel-web_spider