Which Statement About Gill Ventilation in Fishes Is False

Multiple Choice

Which statement about gill ventilation in fishes is false?

A) In some species, gill ventilation occurs via open-mouth swimming.
B) In most species, gill ventilation occurs via a two-pump mechanism.
C) During an expiration by a fish using the two-pump mechanism, the mouth cavity contracts, forcing water over the gills.
D) During an inspiration by a fish using the two-pump mechanism, the opercular cavity expands and the opercular flaps are kept closed.
E) Tunas use the two-pump mechanism.