The type of interaction present when Christmas tree worms bore into the skeleton of the coral to obtain nutrients

The interaction present when Christmas tree worms bore into the skeleton of the coral to obtain nutrients is known as a symbiotic relationship, specifically a form of commensalism.

Here are the steps to understand this:

1. Identify the organisms involved: In this case, the organisms are the Christmas tree worms and the coral.

2. Understand the interaction: The Christmas tree worms are boring into the skeleton of the coral to obtain nutrients. This means they are benefiting from the relationship by gaining food.

3. Identify the type of interaction: In symbiotic relationships, there are generally three types - mutualism (both organisms benefit), parasitism (one organism benefits at the expense of the other), and commensalism (one organism benefits while the other is neither harmed nor benefited).

4. Analyze the benefit or harm to each organism: In this case, the Christmas tree worms are benefiting by obtaining nutrients. The coral, on the other hand, is not necessarily harmed by this interaction, as the worms bore into the skeleton, not the living tissue, and the coral can continue to grow around the worm.

Therefore, this interaction can be classified as commensalism, a type of symbiotic relationship where one organism benefits and the other is not significantly affected.