Shark (4)
(Other definitions for pool that I've seen before include "Ball game - piece of water" , "Lido - kitty - ball game" , "found in watery location" , "Put in common fund; (pub) game" , "Bellini opera" .)
(Other definitions for reef that I've seen before include "Sandbank" , "Reduce a sail's surface - shipping hazard" , "Rocky ridge near sea surface" , "Rock in shallow water" , "Coral structure" .)
'shark' is the definition.
(synonyms)
This is all the clue.
(Other definitions for loan that I've seen before include "Something borrowed" , "One acquired temporarily" , "Cash advance" , "Advance, borrowing" , "Credit" .)
'shark' is the definition.
(mako shark is a kind of shark)
This is all the clue.
(Other definitions for mako that I've seen before include "NZ tree" , "Shark" .)
'shark' is the definition.
(I know that hammerhead is a type of shark)
This is the entire clue.
(Other definitions for hammerhead that I've seen before include "Fish" , "Type of shark" , "Distinctively shaped shark" , "marine predator" , "Heavy hitter" .)