Why Does Otter Tipo Pick Up Mangrove Propagules?

I try to save money to buy mullets for these wild otters. Cause they help us protect the mangroves. The most special is otter Tipo, she knows how to pick up mangrove propagules for me. Tipo helped me plant more than 3 million mangrove trees in 4 years, but those mangrove trees were trampled or cut down to make intensive shrimp farms.