Box jellyfish can fucking hunt cooperatively and actively search for prey

OP here, what you just said is not biologically true.

Yes Cnidarians are colonial organisms; one individual = one colony.

The 'hive mind' idea does not apply outside the body of one jellyfish - so how can two seperate colonies of colonial organisms coordinate a hunting effort ?

They doesnt send signals of any kind?

I'm sure they do, probably something to do with calcium or other ion gradients - my question is: how can something actively make decisions without a brain ?

what could be receiving signals, processing information, and acting accordingly ?

Then its just what i said, you dont need brain to process signals. You just get the signal and do stuff accordingly, like your body knows that you should move to the left when something happens (change in ion gradient or whatever) so body moves. Neourons in human brain dont have mind or brain on their own, but they send exact signals when they get exact signal. The same with jellys probably, just a programming in their body.

Its like a signal to the trigger, you got it, you change your state. And triggers dont have brains, they just give answers on some occuarences.

not one of those papers discusses box jelly fish pack hunting behavior, you collosal winged faggot

Hays, G. C., Bastian, T., Doyle, T. K., Fossette, S., Gleiss, A. C., Gravenor, M. B., ... & Sims, D. W. (2011). High activity and Lévy searches: jellyfish can search the water column like fish. Proceedings of the Royal Society of London B: Biological Sciences, rspb20110978.

Nilsson, D. E., Gislén, L., Coates, M. M., Skogh, C., & Garm, A. (2005). Advanced optics in a jellyfish eye. Nature, 435(7039), 201-205.

Garm, A., Oskarsson, M., & Nilsson, D. E. (2011). Box jellyfish use terrestrial visual cues for navigation. Current Biology, 21(9), 798-803.

Nilsson, D. E., Gislén, L., Coates, M. M., Skogh, C., & Garm, A. (2005). Advanced optics in a jellyfish eye. Nature, 435(7039), 201-205.

Actual examples of pack hunting is still being investigated. However the capacity for pack hunting is absolutely implied in the literature. Read past the abstract next time professor.

t. recently attended a lecture by one of the top cubozoan experts in the world

also, active hunting is clearly established.

clearly the capacity for pack hunting exists.

even patrolling an area has been documented.

>demands sources
>contributes nothing to the discussion

>half chan
Get

i'm a rogue user m8

Hmm, could it be like a sensor that detect anomaly in a surrounding? Like if a trace of any substance that hints life is detected, these jellyfish automatically swarms towards it without needing to process the information. Like if you push a middle part of a loose string, the two ends come towards you and meet, doesnt mean they are concious of their decision

I see absolutely nothing in there that implies that box jellies hunt in packs.

>>patrolling an area
from "Box jellyfish use terrestrial visual cues for navigation," it appears 'patrolling an area' means heading for the edge of the water by the mangrove trees.

The authors of this paper demonstrate that box jellies can head toward the mangrove roots and that they have the necessary sensory apparatus to do so. Pic related. It appears they can tell how far away they are from the mangrove tree by the intensity of the light. More intense light = I'm not in mangrove trees = bad!

We also know they have four of these eyes and all of them point up at all times. So with two different intensity values on each side of the jelly they can have some idea of where the light is. Using these intensity values the jelly fish could steer away from higher intensities of light by pulsing more on the side with intensities.

This is much like the so called 'fear' braitenberg vehicle:
en.wikipedia.org/wiki/Braitenberg_vehicle

However, I think with some simple tweaks one could make box-jellies that 'hunt' in 'packs.' So first we need our jellies to 'flash,' preferably with some signal we can discriminate from the environment like circularly polarized light and preferably with directional dependence. Second we need to modify the eyes such that they can detect and 'count' the number of flashes. Third we add some sort of wake or turbidity detector.

So we use the eyes which count flashes to turn the jelly in the direction of other jelly, we use the turbidity detector to sense the wake of other jellyfish and turn the jellyfish away from other jellies, preventing collision and nasty mangles of jellies. With this we have pretty much implemented the boids swarming algorithm:
cs.stanford.edu/people/eroberts/courses/soco/projects/2008-09/modeling-natural-systems/boids.html

>half chan
lol hey loser, how's the fight against gamergate and the sjws going

primary perception.
en.wikipedia.org/wiki/Plant_perception_(paranormal).
works with nearly everything even isolated cells.

Same way the immune system chases after bacteria, chemotaxis.

Accidently joined a fan club with my friends

we died in real life

Try pastebin

>how can something actively make decisions without a brain ?
It doesn't have to.

This might as well be emergent behaviour arising from swarming given some predefined patterns. Wiki has a bit about this and on species that hunt.

Parameters can be like attracting to prey and maintaining a distance to other jellyfish that is close enough to form a pack but not so close as to entangle.

This is really going to hurt your feelings

ted.com/talks/heather_barnett_what_humans_can_learn_from_semi_intelligent_slime_1?language=en

Well how did you manage to ask this question? There's your awnser.