Some sources online state that the relationship between a shark and a remora is mutualism, while others call it commensalism. Which of the following situations would make it MUTUALISM?

Question

1)if the remora is removing and eating parasites from the scales of the shark
2)if the remora is sucking blood from the shark
3)if the remors is just catching a free ride

Answer 1

To determine whether the relationship between a shark and a remora is mutualism or commensalism, we need to consider the effects on both species involved.

1. If the remora is removing and eating parasites from the scales of the shark: This situation represents mutualism. In this case, the remora benefits by getting food, and the shark benefits from the removal of parasites, which promotes its health.

2. If the remora is sucking blood from the shark: This scenario would not be considered mutualism, as the remora is harming the shark while benefiting itself. This type of relationship is more aligned with parasitism.

3. If the remora is just catching a free ride: In this case, the remora benefits from being transported without affecting the shark negatively. This situation would be classified as commensalism, where one species benefits and the other is neither helped nor harmed.

Therefore, situation 1 (removing and eating parasites from the shark) is what would make the relationship mutualism.