Complex sentence: The pygmy seahorses comprise several species of tiny seahorse in the syngnathid (seahorses and pipefish) family or Syngnathidae in Southeast Asia around the Coral Triangle.
Split into simpler sentences: The pygmy seahorses comprise several species of tiny seahorse in the syngnathid family or Syngnathidae (seahorses and pipefish). They are found in Southeast Asia around the Coral Triangle.