Pathfinding String expected got object help?

So I keep getting the error

''Workspace.MovingSharks.Script:9: bad argument #2 to '?' (string expected, got Object)"

I've tried and tried again but to avail, What's wrong?

local movingpeices = script.Parent.MoveToPieces:GetChildren()
local sharks =script.Parent:GetChildren() 

while wait() do
	wait(1)
	for i,v in pairs (sharks) do
		if script.Parent.Shark.Name == "Shark" then
			local target = movingpeices[math.random(1, #movingpeices)]
			local path = game:GetService("PathfindingService"):ComputeRawPathAsync(script.Parent.Shark.Torso.Position, target.Position, 500)
			local points = path:GetPointCoordinates()
			if path.Status == Enum.PathStatus.Success or Enum.PathStatus.ClosestNoPath then
			repeat wait() until points ~= nil
				for i = 1, #points do
					script.Parent.Shark.Humanoid:MoveTo(points[i])
				end
			end
		end
	end
end

You need to use the Object's name in the square brackets, rather than the object itself. You're doing script.Parent[v], you need to do script.Parent[v.Name].