Identify the relationships between the zooxanthellae and the hard coral, the remora and the manta ray, the tiger shark and the green sea turtle, and the dolphin and the school of trevallies and state why you chose that relationship. the relationships will be predation, competition, commensalism, or mutualism. 

Zooxanthellae and the hard coral-Zooxanthellae refers to the symbiotic algae that live inside the hard or stony corals. The symbiotic connection depends on the coral's powerlessness to produce adequate measures of sustenance and the algae's capacity for photosynthesis and changing over substance components into vitality. - mutualism 
The remora and the manta ray - The advantages to the remoras and remora for living in such close relationship with their bigger hosts are clear, however there is a level headed discussion about whether the manta beams get a noteworthy return in profits by these connections. - mutualism 
The tiger shark and the green ocean turtle - the turtle is eaten by the shark- predation 
The dolphin and the school of trevallies-To nourish, dolphins utilize a quick, amaze assault, and, not at all like the chasing packs of trevallies, dolphins can effectively chase alone. - predation 
Hope this helps!