seigaiha or seigainami literally means wave of the sea. japanese seamless pattern abstract scales simple nature background circle

abstract arch ark art asia asian backdrop china chinese circle circular concentric curve curves design envelope ethnic fish folk geometric grid half illustration japan japanese motif national native nature oriental ornament oval pattern repeat retro round rounded scallop seamless seigaiha semi semicircular shell simplicity skin striped surface texture tide tile vaulted vector vintage waveform