Burial at sea

The ceremony may include burial in a casket, burial sewn in sailcloth, burial in an urn, or scattering of the cremated remains from a ship. Burial at sea by aircraft is usually done only with cremated remains. Other types of burial at sea include the mixing of the ashes with concrete and dropping the concrete block to form an artificial reef such as the Atlantis Reef.

Question: are you allowed to put ashes in the sea
Answer: yes