Syngnathus tetragonus Mitchill, 1814 Dataset GBIF Backbone Taxonomy Rank SPECIES Classification kingdom Animalia phylum Chordata order Syngnathiformes family Syngnathidae genus Hippocampus species Hippocampus erectus Name Homonyms Syngnathus tetragonus Thunberg, 1776 Syngnathus tetragonus Mitchill, 1814