Fish are measured, photographed, and released live after capture. Practice developed to prevent overharvest in fish stocks. First introduced in Michigan in 1952 to reduce trout stocking costs. Lee Wulff promoted catch and release in 1936
Fish farming involves commercial breeding in tanks or ponds for food. China produces 62% of world's farmed fish production. Aquaculture increased 5.3% annually from 2000-2018. Most important species are carp, catfish, salmon and tilapia
Goldfish originated in China from wild carp. Two main types: hearty single-tailed and fancy double-tailed varieties. Goldfish can reach sizes up to 18.7 inches
pH measures water acidity/alkalinity on a scale from 0 to 14. Pure water is neutral, anything below 7 is acidic, above 7 is alkaline. CO2 dissolves in water, lowering pH
Research fish species and protein requirements before purchasing food. Bottom feeders have downturned mouths, mid-feeders have forward-pointing mouths. Surface feeders have upturned mouths and cluster to surface. Food should float, be small enough to fit in mouth, and contain 5-40% protein
Fin rot affects fish's tail, dorsal, or pectoral fins. Early stages show ragged or shredded fin edges. Disease progresses to semicircular bite shape or complete fin destruction. Affected fins develop white cotton-like lining and red streaks. Severe cases may cause abdominal swelling and ulcers