Bigbelly Seahorse
Hippocampus abdominalis
- Least concern
- Card rarity: Common
- Fish

The big-belly seahorse or pot-bellied seahorse is one of the largest seahorse species in the world, with a length of up to 35 cm (14 in), and is the largest in Australia. Seahorses are members of the family Syngnathidae, and are teleost fishes. They are found in south-eastern Australia and New Zealand, and are listed on Appendix II of CITES. They are the only species of seahorse found in New Zealand, with a habitat range spanning from the Three Kings Island in the north all the way to the Snares Islands in the south.
Classification
- Class
- Actinopterygii
- Order
- Syngnathiformes
- Family
- Syngnathidae
- Genus
- Hippocampus