The Atua-Kararehe is a large rahi native to Ga-koro. 
It uses its long fishlike tail to propel itself though the water, and its sharp pincers to
spear its prey. Its powerful jaw can crush through solid slabs of protodermis.
Near impossible to tame, these rahi have been known to challenge Tarakava. 
Mainly it eats fish or wounded shore rahi but wouldn't mind an occasional sunbathing
Ga-matoran.........
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Now some notes about the MOC.
Head: Shweet-n-simple. You should try to build it, its a fun one.
Body: The body uses many Baddie Body Bases (say that three times fast!)Its back
is a rahkshi back and the lower body is made of borohk bodyplates.
Claws: these were made before Nidhiki, actually, I made them after I bought Takanuva.
Until July(Rahi Building Contest. Yes he would of been my entry. #@!% essay!)
I had no use for them.
Tail: Fairly simple. Just some rahkshi legs and metru parts slapped together(updated when I bought Nivvy and Dume)
Tail End: Insanly simple, but oh so effictive. Using one-o-dem bendy rods helped me hold the fins in place.
Legs: Also, like the tail rahkshi legs and metru parts slapped together.
Feet: Took me like 2 hours to perfect them. Bohrok headpeices helped ALOT.
Overall: total time taken(to put together) 3 hours. Total time taken to plan 1 month.
as you can see I like yellow-n-black.