Fish Identification Exercise

The key below identifies eight fish. Six of them are illustrated below. What is the scientific name of each fish?

1. The fins or body have spines along the top (dorsal) surface

...2
  No obvious dorsal spine

...3
2. Spines on the fins

...4
  Separate spines on the body but not on the fins
...5
3. Single dorsal fin
...6
  Two dorsal fins
Gobius
4. Dorsal fins similar in size
Cottus
  The front dorsal fin much smaller than the rear one
Trachinus
5. Snout upturned, body slender
Spinachia
  Snout not upturned, body not slender
Gasterosteus
6. Distinct tail fin
...7
  Dorsal fin merged with tail fin
Zoarces
7. Elongated body; tail fin with central notch
Ammodytes
  Body not noticeably elongated; tail fin smooth
Labrus

Fish (a) is:

Fish (b) is:

Fish (c) is:

Fish (d) is:

Fish (e) is:

Fish (f) is:

You got out of correct.

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