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Ocean Swimming

Wednesday 8 January - oh where oh where did the bluebottles go?

Bluebottles - the "blue peril", "little f&ckers" whatever we call them seem to have taken themselves on another adventure aftetr wreaking havoc on the weekend, together with their sharky friends.  So, where do they come from, and where do they go?  The answer, my friend, is actually blowing in the wind!

Speaking of wind, it has swung south, meaning the bluebottles have drifted away to  - who cares?  However the southerly also brought brilliant (albeit moody) conditions to our piece of paradise for those who infused vitamin Sea this morning.

water temp:

air temp:

conditions: Sublime, moody

vibe: all smiles

Many of you may have seen the post on the B&B and in newsfeeds for yet another study on Bluebottles, to assist in predicting when their blue armies may make an appearance (and the life guards and life savers can be prepared for an influx of a variety of pained expressions!) - c.40,000 of them actually recorded this last year!  

Here is the article in case you are interested:

https://www.abc.net.au/news/2024-12-25/bluebottles-prediction-nsw-beaches-what-to-do-if-stung/104758648

a few type 2 fun facts about bluebottles that you may not have known but which may explain the varying degreees of pain.

  • bluebottles are from the Jellyfish family (siphonophores) and a bluebottle is actually a "metropolis" (actaully the scientific term is colony but its really a thriving "smart" city!) of four kinds of individuals in the "zooid" family
  • the zooids support each other and are interdependent
  • the pretty blue "bubble" (the pneumatophore) supports the colony
  • the pretty long thin tentacales (which can be metres long) detect and capture "food" which include larval fish and small crustaceans and mollusks - as the pretty blue bubble floats on the surface, the long blue tentacles silently descend, thereby capturing said food (and the odd arm and leg and foot and face and other human body parts)
  • there are also digestive and reproductive zooids - all co dependent on one another for survival (what if we could separate them???)
  • Bluebottles are prevalent pretty much all of Australia except less so in the top end, perhaps the crocs eat them? or the Irukanji (the most deadly marine stinger) kills them?  
  • The Bluebottle also belongs to the phylum Cnidaria, which includes corals and sea anemones (i cannot think of a bigger contrast - all are beautiful however the bluebottle is also a beast!

Interestingly, the "floats" are like sails on a yacht and are angled towards the right or left, to maximise downwind efficiency (for sailors, this is like VMG or velocity made good - perhaps a new sail design in the making?). This is a clever evolution to ensure that only 50% of the bluebottles can be stranded on shore, leaving the remaining to wreak havoc somewhere else.  That said, it is hypothesized by scientists that the pneumatophore can alter the "shape" of the float or sail (and therefore direction) by a bit of muscular contraction - kind of like trimming the sails on a yacht.

That all said, a few general observations have been frequently shared on social media and the B&B pages to help you identify days when its safer to swim harbour side (within the shark net of course!):

  • Bluebottles tend to be blown into Sydney beaches by North Easterly breezes, and exacerbated if the swell is also from the North East
  • The Nor Easters are prevalent in summer however increasingly also bringing the blue peril in spring

Treatment:

Straight from "Beachsafe" (https://beachsafe.org.au/surf-safety/bluebottle).  As there are no public hot showers on Manly beach, the lifeguards will often announce a recommendation to run the sting area under cold water or applying cold packs or ice. There are several cold water showers along Manly Beach.  IF you can access hot water (noting no public hot water facilities on manly beach) then run hot water over the sting, as hot as you can manage.  If you believe you are having or will have a reaction, seek medical attention ASAP.   

Hopefully the study mentioned above will, by next summer, be able to assist in predicting when Bluebottle armies are likely to arrive.

 

 

 

 

 

 

 

 

 

Bold and Beautiful is owned and operated by Bold and Beautiful Swim Squad Pty Ltd.

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