Online Aquarium for Kids
The Swordtail
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A Rudder and Oars |
This
fish looks like an arrow, and swims as fast as an arrow in flight. Its
fins are both a rudder and oars and sometimes a brake as well. As soon as
it wants to stop, it fans them out and stops dead; its brakes are working.
They often save its life. If it is being chased by a predator it will dart
into the weeds and stop dead there, hid, while the force of inertia carries
the predator past. It swims past and by the time it slows down it has no
idea where the Lyretail has got to. Now you see it, now you don't. And so
it sets of in pursuit of another. |
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