Oily fish

Rarity: Common

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At a glance

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Knowledge cost

3

Influence

4

Resistance

4

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What Wikipedia says

Oily fish, also known as blue fish, greasy fish or fatty fish, are species of fish with oil (fats) in soft tissues and in the coelomic cavity around the gut (These cavities help produce fat thus making the fish more oily).

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

Image: Unknown author, Public domain, via Wikimedia Commons.