:20:01
and small fish
that concentrate here in summer.
:20:06
To capture
the immense quantities
:20:08
of food they need
:20:09
some humpbacks have devised
an extraordinary technique
:20:13
of cooperative feeding.
:20:16
Diving in unison
:20:17
they surround
a school of herring
:20:19
while one or more
sings a ritual feeding song.
:20:27
Simultaneously, a whale blows
a circular net of bubbles
:20:32
around the fish.
:20:40
Then, as the trap is completed
:20:42
the entire group rockets upward
through the bubble bath.
:21:09
Each species
finds a way to survive.
:21:12
Humpbacks have learned to invent
:21:14
and, more importantly,
to cooperate.
:21:40
In summer,
a miracle arrives from the sea
:21:46
in wave after wave
:21:47
salmon return
from the open ocean
:21:50
and embark
on a final migration inland
:21:53
to spawn in the same streams
of their birth.