It will be able after “Paparazzi” Franklin’s mission.
You should take the photos and email to Los Santos Tourist info. You get list of 20 animals.
Once the photo is snapped, use the SEND PHOTO(S) option and email the picture to the LS Tourist Board to complete the transaction.
Once all 20 animals have been snapped, the special Kraken Sub is unlocked for further underwater adventures.
The full list of animals and locations:
BOAR
BORDER COLLIE
CAT
CHICKEN-HAWK
CORMORANT
COW
COYOTE
CROW
DEER
HEN
HUSKY
MOUNTAIN LION
PIG
POODLE
PUG
RABBIT
RETRIEVER
ROTTWEILER
SEAGULL
WEST HIGHLAND TERRIER
The Kraken submarine will be docked at the San Chianski Mountains
