sea slug (various orthogastropod species, esp. of order Nudibranchia); nudibranch
black-tailed gull (Larus crassirostris)
sea snake; worm eel (Ophichthidae spp.); snake eel
sea firefly (Vargula hilgendorfii); seed shrimp
sea monster; green turtle
storm petrel (any bird of family Hydrobatidae)
murrelet (esp. the ancient murrelet, Synthliboramphus antiquus); roundbelly cowfish (Lactoria diaphana)
marine iguana (Amblyrhynchus cristatus)
sea pen (any coelenterate of the family Pennatulidae or related families); sea feather
seafood; products of the sea; marine products; fruits of the sea
sea grapes (Caulerpa lentillifera)
Japanese cormorant (Phalacrocorax capillatus); Temminck's cormorant
Chloeia flava (species of bristle worm)
sea chub (Ditrema temminckii temminckii)
feather star (Comatulida spp.); comatulid; Comanthus japonica (species of feather star)
beach; seashore; seaside; coast
beach hut; beachside clubhouse
sea of blood; pool of blood
seaside; seashore; coast; coastland
sea of fire; sea of flame
marine plant; seagrass; seaweed
oceanic noise; rumbling of the sea; mistpouffer
Mare Nubium (lunar mare); Sea of Clouds
Mare Tranquillitatis (lunar mare); Sea of Tranquility
Marine Day (national holiday; 3rd Monday of July)
seafood; products of the sea; marine products; fruits of the sea
large number of words; (lit.) sea of words
saltwater crocodile (Crocodylus porosus); estuarine crocodile
Hydra (constellation); the Sea Serpent
whelk egg case; egg capsule of a gastropod
white squill (Urginea maritima); sea onion
short dragonfish (Eurypegasus draconis)
pink sea milkwort (Glaux maritima var. obtusifolia)
Barnea dilatata (species of piddock)
parakeet auklet (Aethia psittacula)
eel-like sea creature (i.e. saltwater eels, sea snakes, etc.)
Mare Fecunditatis (lunar mare); Sea of Fertility
a narrow-minded person cannot understand the ways of the world; (lit.) a frog in the well cannot understand the ocean even if it is explained to it