These straps are used to bind the batim to one's arm/hand (Tefillin shel Yad) and to one's head (Tefillin shel Rosh) in obedience to Deuteronomy 6:8 (And thou shalt bind them for a sign upon thine hand, and they shall be as frontlets between thine eyes).
Given that a single mangrove area can produce as much as four tons of detritus per year, the mud crab's work as a decomposer is a primary part of the detritus-based food ecology that supports fisheries populations.
Decomposers-Bacteria Engines of Earth's Nutrient Cycles. Decomposers are the organisms that eat, digest and break down once living things which have died. They are absolutely essential in the nutrient cycles. In essence, all living things, including humans, are borrowing the elements that make up their bodies. On death we need to recycle them back so other plants and animals can use them. Recycling the elements is essential.