Venus flower from Philippines

The Venus' flower basket (Euplectella aspergillum) is a hexactinellid sponge in the phylum Porifera inhabiting the deep ocean. In traditional Asian cultures, this particular sponge (in a dead, dry state) was given as a wedding gift because the sponge symbiotically houses two small shrimp, a male and a female, who live out their lives inside the sponge. They breed, and when their offspring are tiny, the offspring escape to find a Venus' flower basket of their own. The shrimp inside the basket clean it and, in return, the basket provides food for the shrimp by trapping it in its tissues and then releasing wastes into the body of the sponge for the shrimp. It is also speculated that the bioluminescent light of bacteria harnessed by the sponge may attract other small organisms which the shrimp eat. In Japan they symbolise the idea "till death us do part".Euplectella lives in commensal relationship with certain shrimps. It is given as a *precious marriage gift* in Japan, symbolising the idea ‘‘till death us do part’’*.

The shell (or snails also known as "snail") is one of limestone (calcite and / or aragonite) and other minerals existing (mostly) external skeleton, which is produced by a mollusc (tribe of Mollusca). The shell gives the animal strength and protects the animal against external influences such as predation, injuries, dehydration, etc. The shell grows during the life of the mollusk. The science that studies all aspects of mollusks, called malacology. A branch of malacology which itself only with the shell is called conchology. Previously it was considered wrong to conclude that malacology was not involved with the shell and the distinction between malacology and conchology was laid by some very sharp. In current practice, the terms are often interchangeably, and they are more or less considered as synonyms. Caps may be used to hardening of a passageway, which is then sometimes called a "shell path" is mentioned. Also, shells can be burned to lime shell, which is often used as a building material in the past, was used instead of cement.

 
Shells from Cebu