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The diving bell spider or water spider
This spider lives in an airbubble in the ditch.
Its a juwel to look at, and its a hard working spider;
It collects air on the surface and transports it to
its airbubble.
Most of the time it spends it time waiying in the bubble.
But at night it swims around in the aquarium hunting
for small fish.
the airbubble
The bubble is anchored on the stem and leaves of
waterplants. If a spider is young it hunts on Waterfleas or Daphnia
If the ditch contains a lot of oxygen the bubble wont loose
its oxygen fastly and the spider can spend its time on hunting.
The biggest enemie is the water tiger
in the aquarium
The water spider is a living juwel in youre native aquarium
but its a succesfull predator : sometimes a small fish or newt
disappears.
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an old image from the book:"das leben des Binnenwasser" (1870)
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