They are the grooves you see in the throat area of the whale; allowing the throat to expand, when taking in large amounts of water when filter feeding.
Please take a look at the related link below, I think you will find it very interesting..
a wales throat pleats is a small comlpanate in its throat and it can make aloitsught of noise.it ataches to its metothoric lensium wich can cause damage to its thrat wich conects to its...
Throat pleats, or throat groves),allow the throat to expand a great deal (kind of like an accordion) This usually happens when the whale is catching masses of small fish with big gulps of water. This...