big-bellied seahorse Directory References Discover What Is the Most Widely Practiced Religion in the World? Roman Catholic Saints 10 Failed Doomsday Predictions 10 Great Sports Rivalries Which Religion Is the Oldest? Why Is the Mona Lisa So Famous? The World’s 5 Most Commonly Used Writing Systems Contents big-bellied seahorse fish Ask the Chatbot a Question Ask the Chatbot a Question Also known as: Hippocampus abdominalis Learn about this topic in these articles:seahorses In seahorseThe largest species, the big-bellied seahorse (H. abdominalis), which inhabits the waters off South Australia and New Zealand, can grow up to 35 cm (13.8 inches) in length.Read More