the sand
They sting them with their tentacles
Jellyfish :D
The mangrove jellyfish always appears to be the wrong way round or upside down but in acctual fact that is one of the beauties of the jellyfish. It will lie in the water pretending to be dead or asleep when actually the jellyfish is supposed to be like this and when its pray comes near it will reach out its tentacles and electricute the pray.
Essentially, we would presume that a jellyfish would not know or think about what it's doing. A jellyfish would go on its instincts. You have to remember that a jellyfish still has neurons, but it will not have a center of control of these neurons (which we call the brain). Thus, the jellyfish would not think to attack another fish and eat it, its neurons will simply react to the closeness of a fish and engage the jellyfish in this behaviour of killing and eating its pray. It is done pretty automatically. However, I do not know if the jellyfish would be able to learn with no brain. It can adapt to the environment, but can we make it learn specific behaviours?? So basically jellyfish are like robots, they run on autopilot.
yes
They attack there pray
Yes. If you happen to see or run into a blue bottle jellyfish, you better swim away.
Yes. Without notice and without warning.
you try as hard as you possibly can to survive the attack and pray that you live
hold there neck anddigs in
it doesnt it eats grasshopers,@ plants