Semiaquatic

Semiaquatic animals include:

• Vertebrates
  • Amphibious fish; also several types of normally fully aquatic fish such as the grunion and plainfin midshipman that spawn in the intertidal zone
  • Some amphibians such as newts and salamanders, and some frogs such as fire-bellied toads and wood frogs.
  • Some reptiles such as crocodilians, turtles, water snakes and marine iguanas.
  • Waterbirds, especially penguins, waterfowls, storks and shorebirds.
  • Some rodents such as beavers, muskrats and capybaras.
  • Some insectivorous mammals such as desmans, water shrews and platypuses.
  • Some carnivoran mammals, including seals, otter and polar bears.
  • Some marsupials, including the water opossum and the two lutrine opossums.
  • Hippopotamuses.
  • Indian rhinoceros.
  • Water buffalo.
  • Tapirs.
• Semiterrestrial echinoderms of the intertidal zone, such as the "cliff-clinging" sea urchin Colobocentrotus atratus and the starfish Pisaster ochraceus
• Arthropods
  • Aquatic insects (e.g., dragonflies) with at least one non-aquatic life stage (e.g., adults), or amphibious insects (e.g., amphibious caterpillars or the ant Polyrhachis sokolova).^{[note 1]} Members of the hemipteran infraorders Gerromorpha and Nepomorpha occupy a variety of semiaquatic and aquatic niches, with many of the former locomoting on the water surface; a few of these are marine (e.g., Halobates, Hermatobates).
  • Semiaquatic springtails, such as Anurida maritima
  • Semiterrestrial malacostracan crustaceans (e.g., many crabs, such as Pachygrapsus marmoratus,^{[note 2]} some amphipods, such as Orchestia gammarellus, some isopods, such as Ligia oceanica and some barnacles, such as Balanus glandula)
  • Horseshoe crabs are mostly aquatic but spawn in the intertidal zone; juveniles live in tidal flats
  • Semiaquatic spiders, such as AncylometesorDolomedes (these are distinct from the almost fully aquatic Argyroneta)
  • An amphibious centipede, Scolopendra cataracta
• Semiaquatic annelids, such as the earthworm Sparganophilus
• Molluscs
  • Intertidal bivalves, such as Enigmonia, which lives on mangroves
  • Intertidal chitons, such as Acanthopleura granulata
  • Semiterrestrial gastropods, such as the intertidal Patella vulgata, a limpet; also amphibious freshwater and marine snails, such as PomatiopsisorCerithideopsis scalariformis, respectively
• Semiterrestrial flatworms of the intertidal zone, such as the acotylean Myoramyxa pardalota^[4]

Semiaquatic plants include:

• Semiaquatic angiosperms (e.g., mangroves, water spinach, water cabbage, and the entire order Nymphaeales)
• Semiaquatic conifers, such as pond cypress
• Semiaquatic ferns, such as Pilularia americana
• A semiaquatic horsetail, Equisetum fluviatile
• Semiaquatic quillworts, such as Isoetes melanospora
• Semiaquatic club mosses, such as Lycopodiella inundata
• Semiaquatic mosses, such as Sphagnum macrophyllum
• Semiaquatic liverworts, such as Riccia fluitans