Modifying fish to make them more attractive as pets is an increasingly divisive issue. Historically, artificially dyeing fish was fairly common, with glassfish for example being injected with fluorescent dyes.
Lizards are reptiles of the order Squamata, which they share with the snakes (Ophidians). They are usually four-legged, with external ear openings and movable eyelids. Species range in adult length from a few centimeters (some Caribbean geckos) to nearly three meters (Komodo dragons).
Euthanasia (Greek, "good death") is the practice of killing a human or other animal, in a painless or minimally painful way, for merciful reasons, usually to end suffering. This article discusses non-human animal euthanasia; a separate article covers euthanasia in humans.
An animal is euthanized when it is killed in a manner deemed to be humane, and in the case of a pet, in accordance with the emotional needs of the owner. This process is commonly referred to by the euphemism "put to sleep".
Modifying fish to make them more attractive as pets is an increasingly divisive issue. Historically, artificially dyeing fish was fairly common, with glassfish for example being injected with fluorescent dyes.
"Lacertilla", from Ernst Haeckel's Artforms of Nature, 1904
