I was walking down the beach today (Wollongong Australia, near Sydney) and saw this Jellyfish washed up on the beach. enter image description here

Then I saw another. enter image description here

I wanted to work out what type it was but didn't know where to start. I'm looking for a process to determine the category of Jellyfish this is.

I've had a look at this chart: enter image description here

which tells me it is probably a Catastylus Mosaicus (Blubber fish).

I've also looked at this chart: enter image description here

which tells me it is probably a Rhizostoma Octopus - Barrel or Root Mouth JellyFish (name only - still a jellyfish).

The biggest identifying characteristic seems to be the eight legs. (Clearly a jelly fish - but still a very confusing trait).

My question is: What are the identifying characteristics of a Jellyfish?

  • $\begingroup$ Did you do any research at all about jellyfish? What did you find? What was confusing? $\endgroup$ Commented Jan 9, 2016 at 15:55
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    $\begingroup$ @anongoodnurse I am wondering if they are using "category" in the colloquial sense and what they really mean is that they are interested in finding out how you can look at a jellyfish and visually identify its species. $\endgroup$
    – AMR
    Commented Jan 10, 2016 at 5:12
  • $\begingroup$ @AMR - I think you're right, but it's kind of broad. Intro to jelly fish is better approached on one's own, and this site can help with the difficulties. Just my opinion. $\endgroup$ Commented Jan 10, 2016 at 7:15
  • $\begingroup$ Thanks that's helpful. I've added some comments on my own personal investigation. $\endgroup$
    – hawkeye
    Commented Jan 10, 2016 at 10:44
  • $\begingroup$ Blubber fish is far more likely. en.wikipedia.org/wiki/Rhizostoma_pulmo and oceanaddicts.ie/blog/rhizostoma-octopus-barrel-jellyfish $\endgroup$
    – AMR
    Commented Jan 10, 2016 at 14:10


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