Proud female aquarist and marine biologist (shellfish biologist working on the largest municipal oyster farm in the US) here. I have a 75 gallon reef, and while the tank is *MY* baby, my husband does contribute to the care of the tank. Bulk of the purchases (equipment, livestock, etc) are made by me, but my husband very much enjoys the look of the tank and often is the first to notice expansion of coral colonies or something out of place. While he is loathe to get his hands dirty or wet, he is very supportive of my crazy expensive hobby and accompanies me to conferences and trade shows. Since I've been pregnant with our first child, he's been a big help with water changes and topoffs since carrying 5 gallon buckets of water is out of the equation for me. Daily/weekly responsibility and maintenance (feeding, cleaning, water quality) of the tank is my job, but that's how I prefer it.