School­ing vs. shoal­ing — what’s the dif­fer­ence?

Practical Fishkeeping (UK) - - Marine -

School­ing fish swim in the same di­rec­tion in a co­or­di­nated man­ner. Think of those tight swirls of fish such as sar­dines that we of­ten see on the TV where thou­sands of fish ap­pear to move as one. This tight group swims in such a man­ner to gain pro­tec­tion from preda­tors, to swim with greater ef­fi­ciency and to en­hance their abil­ity to find and ex­ploit food re­sources. Shoal­ing fish stay to­gether for so­cial rea­sons, al­though some of the ad­van­tages de­scribed above will cer­tainly ap­ply as a re­sult of th­ese fish stay­ing to­gether. Th­ese fish will swim to­gether but there isn’t as much co­or­di­na­tion and the group ap­pears more loosely packed.

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