ichthyologist

biologist

deep, profound

fishes

knowledge

a sea, an ocean / a lake / (figuratively) an object covering over a large area, as in 血の海 (chi no umi, “pool of blood”) or 火の海 (hi no umi, “sea of fire”)

holding, possession / wear, durability

continuative of 持つ

to hold, to carry something / to have, to possess / to hold up, to maintain

(chiefly women's speech) first person singular pronoun: I, me