Preposterous Plecostomus

The Plecostomus Catfish lurks at the bottom of the fishtank, waiting to attach his sucker parts to any juicy piece of green algae around.
The plecostomus (more info here) is a useful fish, which tries to keep the algae from clogging up the aquarium. They prefer to hide during the daylight, but they seem to come out when the moonlight is on.
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