Callyspongia aculeata

Rarity: Common

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What Wikipedia says

Callyspongia (Cladochalina) aculeata, commonly known as the branching vase sponge is a species of sea sponge in the family Callyspongiidae. Poriferans are typically characterized by ostia, pores that filter out plankton, with an osculum as the opening which water leaves through, and choanocytes trap food particles.

Excerpt from the Wikipedia article “Callyspongia aculeata”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: Nhobgood (talk) Nick Hobgood, CC BY-SA 3.0, via Wikimedia Commons.