The experiment in the first period targeted skipjack tuna and the second, yellowfin tuna.

2009, Kurt M. Schaefer, Daniel W. Fuller, Barbara A. Block, Vertical Movements and Habitat Utilization of Skipjack (Katsuwonis pelamis), Yellowfin (Thunnus albacares), and Bigeye (Thunnus obesus) Tunas in the Equatorial Eastern Pacific Ocean, Ascertained through Archival Tag Data,
During the daytime, skipjack and yellowfin tunas occasionally exhibited repetitive bounce-dive foraging behavior well below the thermocline to depths of the deep scattering layer, between 225 and 400 m.

2011, Yasushi Mitsunaga, Ricardo Barbaran, C. Endo, Kazuhiko Anraku, Swimming Behavior of Juvenile Yellowfin Tuna (Thunnus albacares) Around Fish Aggragate Devices (F.A.D.S.) in the Philippines, Hubert J. Ceccaldi (editor), Global Change: Mankind-Marine Environment Interactions, page 123,
Ohta and Kakuma (2005) reported that adult yellowfin tuna showed a similar diurnal vertical swimming pattern and dived to depths over 200 m.

Yellowfin tuna

Meaning

Noun

Synonyms