Threadfin Butterflyfish

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Warm Up
400 swim
4 x 50 (25 sprint/25 easy, 25 easy/25 sprint)
(600)

Set 1
3 x 200 @ b
1 x 100 @ b
2 x 200 @ b
2 x 100 @ b -5
1 x 200 @ b
3 x 100 @ b -10
(1800)

Warm Down
200 easy

Total: 2,600

The Threadfin butterflyfish (Chaetadon Auriga) is also known as the Auriga butterflyfish, Threadfin coralfish, Cross-stripe butterfly and Whip butterflyfish. Their common name comes from the filament that hangs off the back of the dorsal fin in adult fish. This can be seen in the image above. The filament is formed by the fusing of the fifth and sixth filaments of the soft dorsal fin into a thread. The thread grows longer as the fish ages.