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The transition between branchial pumping and ram ventilation in fishes: energetic consequences and dependence on water oxygen tension | Semantic Scholar
Shark Research at University of Miami - A pump is placed in the mouth to allow water to flow over the sharks gills and simulate ram ventilation. | Facebook
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Structural adaptations for ram ventilation: Gill fusions in scombrids and billfishes - Wegner - 2013 - Journal of Morphology - Wiley Online Library
![National Aquarium on Twitter: "Imagine if you had to move around just to breathe! That's the case for sharks that breathe via ram ventilation. However, not all sharks need to swim to National Aquarium on Twitter: "Imagine if you had to move around just to breathe! That's the case for sharks that breathe via ram ventilation. However, not all sharks need to swim to](https://pbs.twimg.com/media/EBAlOAIXkAAUEtY.jpg)
National Aquarium on Twitter: "Imagine if you had to move around just to breathe! That's the case for sharks that breathe via ram ventilation. However, not all sharks need to swim to
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Leo Chan Gaskins on Twitter: "Lemon Sharks (Negaprion brevirostris) are very adaptive! Sharks have two ways to breathe - either obligate ram ventilation (must swim to breathe to get water past gills)
![Metabolism, Energetic Demand, and Endothermy J.K. Carlson, K.J. Goldman, and C.G. Lowe. - ppt download Metabolism, Energetic Demand, and Endothermy J.K. Carlson, K.J. Goldman, and C.G. Lowe. - ppt download](https://images.slideplayer.com/15/4747848/slides/slide_3.jpg)