Apkallu is quite the glutton. Seaweed, fish, even other Cryptids--if in the sea, he'll eat it. Even the sea gods are at a loss.
In Mesopotamian mythology, the Apkallu (Akkadian) or Abgallu (Babylonian) were wise men or sages who existed before the Flood in the early period of the world. They were sent by the god Ea to bring wisdom to the world. They acted as ministers or advisors to Ea or to Mesopotamian kings. There were 7 or 8 Apkallu (usually 7). They were frequently depicted as humans dressed in fishskins. They usually carried a pail (banduddu) and a sprinkler (mullilu) from which they dispensed purifying waters. Apkallu/Abgallu means "great water man" (ap/ab- "water" + kal/gal- "great" + lu "man")
30-1, 31-4, 32-2, 33-3, 38-3, 40-1, 41-1, 41-4, 44-1, 45-4, 46-1, 46-5, 47-5, 50-1, 50-5, 51-5.