Answer: Sea sponge

What you're looking at

A sea sponge is a simple marine animal found on ocean floors and coral reefs worldwide. These colorful creatures come in countless shapes and sizes, from tiny finger-like projections to massive barrel shapes. Despite their plant-like appearance, sponges are living animals that feed by filtering microscopic particles from seawater.

This close-up photograph reveals the intricate porous texture that makes sponges so effective at their job. The magnified view shows tiny holes and chambers covering the surface, which look almost abstract when zoomed in this far. The pattern and structure become unrecognizable at macro scale, which is why identifying sea sponges from extreme close-ups can be surprisingly tricky.

Look for porous, hole-filled textures with organic, irregular patterns that suggest a filter-feeding organism.

How players did

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Most common wrong guesses: ice pattern on windscreen