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Fish Are Animals Who Do Things

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If you find it hard to believe that fish feel pain, consider this!

Cognition—the ability to think—was an important factor in the establishment of whether fish could feel pain, and it happened that in the same year as Rose's article was published, Bshary, Wickler, and Fricke published a review of the findings on the cognitive capabilities of fish (Bshary et al 2002). Here are a few examples: Recognition of others as individuals has long been established in many varieties of fish, both visually and acoustically (Myrberg and Riggio 1985). It forms the first step towards complex social lives, in which cognition is often most evident. I documented relationships among reef sharks for years. They, too, relate to each other individually. Social learning is illustrated by the migrations of the surgeon fish (Acathurus nigrofuscus), described in detail by Arthur A. Myrberg Jr. in 1998. These fish leave their territories all over the lagoon, and travel in single file through paths in the co…