Assertion: spiny dogfish | /r/AtLocation | a flow tank
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text: Four spiny dogfish were placed in a flow tank (Rolling Hills Research, El Segundo, CA, USA, Model 1520, working section 1.5 m length × 0.5 m height × 0.38 m width) and trained to maintain steady, rectilinear swimming at speeds of 0.50 and 0.75 BL s −1 .