The diet of Callinectes larvatus Ordway, 1863 population which occupy the mangrove of Jiribatuba, Bahia, Brazil (13o03'25"S and 38o47'38"W) is reported. The investigation of its stomachal contents showed that C. larvatus is an omnivorous species of ample feeding spectrum and presents detritivorous and opportunistic feeding strategy.

The occurence of Decapoda crustaceans in the diet of Dasyatis guttata (Bloch & Schneider, 1801) (Elasmobranchii. Dasyatididae) is reported. Inferences are also made about some aspects of the predator - prey relationship in the area around the Ecological Station.

T. froesi Mello-Leitão, 1940 (Arachida Amblypygi) wich has only been known from "Mangabeira" cave since its description in 1940, has now been found in two other caves ("Goat" and "Icó" caves and various small tunnels) in "Morro das Araras" (Macaw Mountain) or "Morro dos Bueiros" (Channeled Moutain) an isolated mesa-like kill in the same region of the "Chapada Diamantina Meridional" Basin of Lençois, two kilometers southeast of the town of Ituaçu (13º48'56"S and 41º17'53"W) and more recently the animal was collected infdarm house in Laje county (13º10'S and 39º25'W) - Oriental Sediment Basin, Jequié-Mutuipe-zone Bahia, Brazil.

Durante o estudo da carcinofauna do litoral baiano, muitos Braquiuros Portunidae foram encontrados. Alguns destes animais foram Callinectes arcuatus Ordway, 1863 que possuia sua distribuição restrita da Califórnia ao Peru e Ilhas Galápagos, no Oceano Pacífico. Esta é a primeira ocorrência desta espécie no Oceano Atlântico e na Costa Brasileira. (Bahia, 12º50'S e 38º50'W).

During the study of the Carcinofauna of the Bahian Coast, some Brachyura Portunidae were found. Some of these animals were Callinectes arcuatus Ordway, 1863 which has its distribution restricted to the Pacific Ocean, from California to Peru and the Galapagos Islands. This is the first occurrence of this species reported from the Atlantic Ocean and the Brazilian Coast (Bahia, 38º50'Wand 12º50'S).