Despite the obvious importance to ecosystem functioning, the most prominent groups belonging to the Grapsidae are generally regarded as less studied in the Philippines. In this study, the occurrence of arboreal-climbing grapsids and other brachyurans associated with the mangals of Quezon and Catanduanes was considered including some aspects on climbing, burrowing and feeding behaviour of selected grapsids represented by and. The non-grapsoid taxa are represented by Varunidae (), Portunidae (, , ,); and Eriphiidae (). (White 1847) [ ] is an exclusive mangrove tree climber (EMTC), while (A. Milne Edwards 1873) is described here as occasional mangrove tree climber (OMTC). (De Haan 1835) is a non-mangrove arborealclimbing species (NTC) only seen on crevices of the mangrove areas. creates burrows most often than. Likewise, the study provides information on the presence of the portunid orange mud crab (); the green mud crab (); the varunid (); and extremely abundant xanthiid crab, in the mangroves of Catanduanes but not in Pagbilao, Quezon.