Given the fact "poisonous darts are used for defense by sea anemones", what is the answer to the question or completion "a person takes a dive under the sea and feels faint, with a dart stuck to them. What might have happened?"

OPT: +they encountered a cnidaria. +they must have startled a shark. +they came in contact with a whale. +they encountered the wrath of Poseidon.
they encountered a cnidaria