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What did you observe?

Identify candidates using visible features.

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AI-generated illustrations to help identify visible features.

Question 1

What is the sponge's overall shape?

Look at the sponge's overall shape without focusing on small details. It may resemble a crust, a lumpy mass, a ball, a cluster of tubes, a bush, a fan or a cup. Choose the most noticeable shape. If several shapes are equally prominent, skip the question.

What is the sponge's overall shape?
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Real photographs of the species, taken by our contributors.

Compatible candidates

8 species

An unknown feature does not rule out a species. Matches are not confidence percentages.