A gravid female of the cranchiid squid genus Bathothauma Chun, 1906 was collected from 1027 m depth in excellent condition, other than having a ruptured ovary and tentacles reduced to stubs. The 2 mm diameter eggs, 18 spermatangia embedded in the skin of her mantle, head, and eye, and the very pronounced nidamental glands indicate full sexual maturity. The eggs are over three times larger than those previously reported in the genus.