I am currently preparing a paper on feeding regimes in some European syngnathids. I am highly interested in data on mouth and snout (especially mouth gape )biometrics in adults of the following species: the seahorse Hippocampus guttulatus, and the pipefishes Syngnathus acus and Entelurus aequoreus. The aim is to assess any relationship between those biometrics and the composition of the diet in the wild. I would greatly appreciate any information. Thank you very much in advance.