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"The box jellyfish actively hunts its prey (small fish), rather than drifting as do true jellyfish. They are strong swimmers, capable of achieving speeds of up
by karim79 3y ago
"The box jellyfish actively hunts its prey (small fish), rather than drifting as do true jellyfish. They are strong swimmers, capable of achieving speeds of up to 1.5 to 2 metres per second or about 4 knots (7.4 km/h; 4.6 mph).[19] and rapidly turning up to 180° in a few bell contractions.[4] Some species are capable to avoid obstacles.[4]" [0]
So wasn't this already, sorta known? If they can do that, then surely they've some notion of what is worth chasing after, and have demonstrated the ability to differentiate between something nourishing (like small fish) from something like an iPhone someone accidentally dropped off of the side of a boat.
[0] https://en.wikipedia.org/wiki/Box_jellyfish#Australia https://en.wikipedia.org/wiki/Box_jellyfish#Australia
- pvg 3y agoThese need not be learned behaviours. You don't learn to breathe or to not-breathe water, for instance.
- zoky 3y agoNot necessarily. Their nervous system could have simply evolved in such a way that it is hardwired to go after anything that seems like a small fish.
- stevenwoo 3y agoThere was a classic study that showed what we humans might intuitively think how brains and vision should work was wrong, at least with frogs - TLDR - their eyes do processing/filtering (one channel - is this thing in field of vision possible prey?) on input before sending some higher level signal to the brain https://phdcns.sissa.it/publication/what-frogs-eye-tells-frogs-brain https://phdcns.sissa.it/publication/what-frogs-eye-tells-fro...