Fig. 1. Lunge-feeding in blue whales and fin whales. (A) A series of three foraging
dives. Each spike at the bottom represents a lunge. (B) Representation of one
vertical lunge at depth. During a vertical lunge, whales move significantly
faster during the ascent than during the descent
(Croll et al., 2001), and
underwater video recordings indicate that whales lunge upside-down (J.
Calambokidis, personal communication, Cascadia Research Collective,
218
West Fourth Avenue, Olympia, WA 98501, USA). Thus, the whale is
depicted upside-down and lunging upwards, with the dashed line indicating the
invagination of the tongue. Modified from Berta and Sumich
(1999).
