"The largest single delivery of fry by a Guppy, as far as we know, was recorded by Paul Hahnel, the well-known Guppy breeder. Mr. Hahnel reports a brood of 170 young from one female, although only 120 of them lived to maturity. Dr. Myron Gordon found 168 embryos in a large wild-caught Platy fish. Swordfish mature at six to eight months of age while Guppies are recorded as delivering their first brood when only 90 days old! Records kept of a female Mollie show that she gave birth to 570 young, through multiple births, in one year."