Second intelligent species that was as advanced as humans
1. We are talking about whales.
2. While they are at least as intelligent as humans, they have spent their energy on internal exploration other than extrinsic technology.
Whale song represents their bio-advanced form of communication. And represents their primary language. Do we humans have anything similar?
3. Dolphins would serve the vital role of Interpreters and diplomats between our peoples
Some whales may understand human speech but only dolphins can actually speak a form of English.