11.   Normal growth resumes when the fish has a secure position.

12.   Saltwater fish have a shorter lifespan in the aquarium.

13.   The fish has a black band on its fin.

14.   The fish has small but very sharp teeth.

15.   This fish has a long, flattened body covered in large, iridescent scales that reflect the light beautifully.

16.   The fish has what amounts to a tiny voltmeter monitoring the voltage at each porthole.

17.   Why does have that fish?

18.   An attempt last century at a restoration effort failed, largely because the fish had no way of swimming past the dams.

19.   And fresh fish does not have an ammonia taste.

20.   And some Taiwan fish have wavy bones from swimming in the hot water discharge of a nuclear plant.