The Ilha do Tumba Extractive Reserve is in the municipality of Cananéia, São Paulo.

[2] The reserve contains a well-preserved area of mangroves, and holds sambaquis that are among the oldest archaeological sites on the south coast.

It has the objective of conserving this area of the Lagamar and supporting crab collection and fishing by the local communities.

It also provides the raw material used to make fish traps, an economically important traditional caiçara technique.

[5] It is administered by the state forestry foundation (Fundação para Conservação e a Produção Florestal do Estado de São Paulo).