The Engineer Goby has a lifespan is at least 3 years, with spawning occurring after 1.5, 2 and 3 years. The female is always listed as being larger than the male ranging. Other than size differences, the only noted difference between the sexes was the females fuller abdomen. Diet was varied and included both prepared and live foods. Spawning occurred in "nests" which ranged from the underside of a bivalve shell, small hole in a rock, to a 1 x 6" PVC tube.
The Engineer Goby egg mass is described as whitish, adhesive and approximately 2 mm in diameter.The spawning frequency range from 8 - 28 days. The incubation is reported as 7 - 10 days at water temperatures of 76-81 F. with specific gravity at 1.021 to 1.022., pH value from 8.2 to 8.3.
The hatching occurs at dusk and larvae are 3.0 mm in length with a small yolk sac and no pigmentation except eyes. The Engineer Goby larvae are phototaxic (attracted towards light) and can be easily collected using a Larval Snagger or using a "mini-mag" type flashlight and collecting the larvae in a glass, bowl, or slow siphoned. The larvae should not be collected with a net. The larvae can be fed rotifers and newly hatched artemia can be introduced between the 9th and 14th day. The initial food size for Engineer Goby larvae is in the 56-200 micron range. The Metamorphosis occurs around 26 days after hatching.