This will reveal the name of a pest fish that has an accessory breathing apparatus that allows it to move overland to colonise new waterbodies. This helps it to escape from deteriorating environmental conditions.

A form of fishing that uses an electric current

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What are poisons specifically used to kill fish called?

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				3				4

A well-known carnivorous fish.

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			18	5		7

What kind of control is rotenone used for?

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13

8

To what reproductive group do gambusia, swordtails,
guppies and platies belong?

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16			10			11			15

The common name for the pest fish Xiphophorus helleni?

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	9	17

Name a pest fish which uses a feeding habit known as roiling.

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19

A word that describes the clearness of water.

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12


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‘Hint sheet’ for puzzle 1

The word is very similar to the one used to describe coating a metal with another metal using an electric current.
Part of the name for the fishy sign of the zodiac + the suffix that means ‘to kill’.
This fish is native to South America. D. Think of a general term that describes what rotenone is (and the opposite of physical).
Humans could also be described in this way.
They give birth to living young.
Also known as a goldfish.
Rearrange the following letters to give the word: B U R Y I T T D I

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Puzzle 1

‘Hint sheet’ for puzzle 1

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Developmental