mouse; rat; dark gray; dark grey; slate (color, colour)
indigo-tinged grey (gray)
grey tinged with brown (gray)
Japanese privet (Ligustrum japonicum)
dragonet (any fish of family Callionymidae, esp. Richard's dragonet, Repomucenus richardsonii)
Japanese arborvitae (Thuja standishii)
vaquita (Phocoena sinus); cochito; gulf porpoise