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Round and flat as a plate, this discus fish swims in side view with a wavy line pattern etched across its disc body and fins that encircle it like a frame. Raised squiggles flow over the flank and head, a ringed eye and small mouth sit up front, and fine rays run through the dorsal, anal and tail fins. Slim ventral fins trail beneath the body. With no base, it works as a biology classroom model of body shape and adaptation and an eye-catching display piece for aquarium lovers.

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