Yes, they can be. Not only gray, black and white but pink as well. Pink dolphin is the common name of The Amazon river dolphin (Inia geoffrensis), that lives in Amazon, Orinoco and Araguaia rivers. It is an endangered specie due to pollution according to International Union for Conservation of Nature.
Recommended Books on How to be an Effective Communicator: 1  The Leader as Communicator: Strategies and Tactics to Build Loyalty, Focus Effort, and Spark Creativity. 2  Stand and Deliver: How to Become a Masterful Communicator and Public Speaker. 3  10 Simple Secrets of the Worldâs Greatest Business Communicators.
14 Effective communication skills. 1. Give them the impression that youâre enthusiastic about talking to them. They want to feel that you would rather be talking to them than anyone else. When you give them the impression that you are excited about talking to them and that you care about them, you make them feel better about themselves.