The most serious threat to coral reefs are ________.
A) floods
B) humans
C) hurricanes
D) sea stars
E) tsunami
Question 2
Which of the following terms describes organisms living on the surface of the sea floor attached to rocks?
A) Benthonektos
B) Epifauna
C) Infauna
D) Nektobenthos
E) Planktofauna