Tribes of Mindanao
A LONG time ago there was a very big crab  which crawled into the sea. And when he went in he crowded the water out so that it ran all over the earth and covered all the land.
Now about one moon before this happened, a wise man had told the people that they must build a large raft.  They did as he commanded and cut many large trees, until they had enough to make three layers. These they bound tightly together, and when it was done they fastened the raft with a long rattan cord to a big pole in the earth.
Soon after this the floods came. White water poured out of the hills, and the sea rose and covered even the highest mountains. The people and animals on the raft were safe, but all the others drowned.
When the waters went down and the raft was again on the ground, it was near their old home, for the rattan cord had held.
But these were the only people left on the whole earth.
Mabel Cook. Philippine Folk Tales. London:
 A somewhat similar
belief that a giant crab is responsible for the tides is widespread throughout
Malaysia. The Batak of Palawan now believe, as also do the Mandaya of
eastern Mindanao, that the tides are caused by a giant crab going in and
out of his hole in the sea.
 The similarity of this to the
biblical story of the Flood leads us to suppose that it has come from
the neighboring Christianized or Mohammedanized people and has been worked
by the Bukidnon into the mould of their own thought. However, the flood
story is sometimes found in such a guise that it cannot be accounted for
by Christian influence. See for example, The
Flood Story as told in the folk-lore of the Igorot tribe, on p. 102.