Did some research on the "compare to" and "compare with" and found that:
"To identify either the similarities or the differences between two things, use "compare to." To identify both the similarities and the differences, use "compare with." In comparing with something, one finds or discusses both things that are alike and things that are different."
In our case, the metabolic rate is the heart of argument. The metabolic rates can be both similar and different between sharks and other fishes. According to the definition it fits.
Here are few more examples:
1) (Compared to, Compared with) running, walking is good for people who have knee problems.
answer: Compared to
2) Andy compared his math teacher (with, to) his English teacher and pointed out what they had in common and what they did not.
answer: wilth
3) When Geri compares her old boyfriend (to. with) her new boyfriend, she points out all the ways in which they are alike.
answer: to
4) In order to decide which city to tour, we had to (compare them with, compare them to) each other.
answer: compare with
Source:
https://homepage.smc.edu/quizzes/cheney_ ... mpare.htmlHere is a link for some of the commonly confused words (ver basic though)....
https://homepage.smc.edu/reading_lab/wor ... nfused.htm