Syngnathiformes

Syngnathiformes: Body elongate and encased in a series of bony rings; mouth small, at end of tube-shaped snout (except in the "finless" pipefish Bulbonaricus, whose adults lack even a short tubiform snout); pelvic fins, when present, abdominal; upper jaw not protractile; lachrymal usually present, other circumorbital bones usually absent; ribs absent; anterior 3-6 vertebrae elongate; aglomerular kidney in at least some.
 * See Fishbase.

Families in this order:
 * Aulostomidae
 * Centriscidae
 * Fistulariidae
 * Solenostomidae
 * Syngnathidae