Figure 2. Map of the Rio Formoso Estuary (Pernambuco State, Brazil) showing (A) the presence or absence of seahorses at sampling sites, and (B) the type of macro-habitat at sampling points n each of the three rivers sampled (Rio dos Passos, Rio Formoso, and Rio Ariquindá), and on the reef (mouth of the estuary).

The description of macro-habitat types can be found in Table 1.