Heterocercal

• Continuous swimmers
• Ram ventilators
• Depending on proportions, can be adapted for either high or low speeds
• Good to excellent efficiency
• Bursts of speed
• Caudal fin of choice for most sharks

Image Source: NOAA Fisheries

Atlantic Spiny Dogfish

Sources: https://manoa.hawaii.edu/exploringourfluidearth/biological/fish/structure-and-function-fish
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