What observation of hydra behaviour suggest some kind of coordination?

What seal eats krill squid and molluscs but not crabs? What will you look for to identify the sex of the female cockroach? Is a group of grasshoppers called hail? What is the name of the spider that looks like an ant? Mutualistic relationship between ladybugs and plants? Does Berlin have mosquitoes? Where in the world is the smallest land biome? Does elidel cure ring worm? Are there any fresh water octopuses? How do praying mantises get their oxygen? How do Rolly Pollies drink water? Can the June beetle live in the UK? Do Purple encrusting sponges live in marine or fresh water? Do they use nicotinetobacco in the smokers for bees? What does a sand flea bite look like? Do fleas have nipples? Is a dust mite alive? What we have to do if a mosquito goes in your eye? Is a ant A virtebrateIs a ant a viribrate? Symbolic meaning of butterfly?