Echinodermata Matching Game

Each image can only have one answer.
The lifeform in the centerish of the image is the important one.

1)

Asteroidea
Echinoidea
Holothuroidea
Ophiuroidea

2)

Asteroidea
Echinoidea
Holothuroidea
Ophiuroidea

3)

Asteroidea
Echinoidea
Holothuroidea
Ophiuroidea

4)

Asteroidea
Echinoidea
Holothuroidea
Ophiuroidea

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