Assertion: atlantic bluefin tuna | /r/CapableOf | perform vertical excursion
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text: On the other hand, if the predation on mesopelagic fauna is facilitated by the rising of these species toward upper water layers during their nocturnal movements, it is also true that the Atlantic bluefin tuna is also able to perform vertical excursion to hunt in deeper waters (i.e., >600 m, as reported by Block et al. 2001).