Slaughter-Bots

possibly make a mess of small fish, etc also. Don't think this has been fully thought out.

-- Don McKenzie

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That's the concern some expressed in the comments on that page, but when you think about it, that scenario's highly unlikely;

- Fish will instinctively swim away from something big which moves and makes noise, and

- Fish will instinctively swim away from a current (in this case being created by the propeller).

What I'm wondering is if they can develop this technology further, to target politicians. Let a few of these loose in Can'tberra and we can broadcast the developments as "reality TV" for entertainment :-)

The 'strings' that guide the jellyfish in allow the fish and most by-catch to escape to escape. Plus as was pointed out almost everything swims faster than this thing

Are jellyfish prey by anything that can get past its sting ?

Certainly. They are prey of some turtles, fish, birds, and other jellyfish.

OTOH, we *do* need a better politician predator.

I think Japanese eat jellyfish (as well as whales).

Jellyfish is pretty common in Asian cooking. AFAIR, I've only eaten it prepared as a salad. I don't think it has much nutritional content (or flavor), but it does have a nice crunchy texture.

Best regards, Spehro Pefhany

I noticed a comment where somebody asked if jellies are one of those sea creatures where every tiny bit chopped off grows to become another adult creature. Technically a jellyfish is a colony of smaller creatures.

You're a colony of smaller creatures. I think you're thinking of a Portuguese man o'war, which is not a jellyfish (it's a siphonophore, according to Wikipedia).

Best regards, Spehro Pefhany

NO, YOUR MOM'S A COLONY OF SMALLER CREATURES!

Erm.. sorry.. carry on... :-p

Tim

Thank you for capturing the middle-school spirit of my heckling. ;-)

It does seem plausible that elements such as mitochondria evolved from independent life forms.

Best regards, Spehro Pefhany