In 2009, India Post and the Philippines Post jointly issued a set of two stamps as part of the Indo-Philippines Joint Issue. The theme focused on marine biodiversity, showcasing two significant marine species: the Gangetic River Dolphin from India and the Butanding (Whale Shark) from the Philippines. These stamps highlighted the importance of preserving marine life and raising awareness about the conservation of aquatic ecosystems.

1. Gangetic River Dolphin (Platanista gangetica):

   • Region: India
   • Description:
     The stamp features the Gangetic River Dolphin, a freshwater dolphin native to the Ganges and Brahmaputra rivers in India. It is an endangered species, often referred to as the "Susu", and is recognized for its role in maintaining the riverine ecosystem's health.
     • Design:
       The dolphin is shown gracefully swimming in a river, surrounded by flowing blue water, symbolizing its natural habitat. The illustration captures the dolphin's unique body shape, including its long snout and dorsal fin, with fine details emphasizing its movement.
     • Colors: Shades of blue and grey, representing the dolphin and its aquatic environment.

2. Butanding (Whale Shark):

   • Region: Philippines
   • Description:
     The Butanding, or Whale Shark, is the largest fish species in the world, found in the warm waters around the Philippines. Despite its massive size, it is a gentle, plankton-feeding creature and plays a crucial role in marine ecosystems.
     • Design:
       The stamp depicts the Butanding swimming in the open ocean, surrounded by coral reefs and marine flora. The intricate patterns of the whale shark's dotted skin are highlighted, making it a visually striking image.
     • Colors: A mix of deep blue for the ocean and white and grey to depict the whale shark's distinctive markings.

Overall Design and Theme:

• Layout: Both stamps feature their respective marine species in their natural habitats, with the Gangetic River Dolphin representing India's freshwater biodiversity and the Butanding symbolizing the Philippines' rich marine life.
• Message: The stamps emphasize the importance of conserving these species, both of which face threats from habitat loss, pollution, and climate change.
• Collaboration: This joint issue signifies the shared commitment of India and the Philippines to biodiversity conservation and fostering international cooperation through philately.

These stamps are a celebration of the unique aquatic heritage of the two nations and the shared responsibility to protect it.