You really don't have to worry about the audience suspending its sense of disbelief because, if you start with a talking shark, readers pretty much check their disbelief at the door.
你真的不用担心观众因为感觉怀疑而停下来 因为，如果你开始就有一只会说话的鲨鱼， 读者几乎在一开始就把他们的质疑抛到九霄云外了。