Acidic: A reading below 7.0 on the pH scale. Activated carbon: A manufactured form of carbon that is highly porous. Adipose fin: A small fin between the dorsal and caudal fins, most notable in tetras and other characoids.
Sea horses are among the most instantly recognizable and fascinating of all marine fish. Less well known, however, are their elongated relatives called pipefish.
The members of these two families have similar care requirements, and they can even be kept together in the same tank, alongside invertebrates and placid fish, such as seahorses and pipefish.
[Ebook] Encyclopedia of Aquarium & Pond Fish – Introduction to Marine Fish – Breeding – Reproduction and breeding
The breeding habits of tropical marine fish are not well documented because only a small number of species have reproduced in captivity. A few groups, however, such as clownfish, gobies, and sea horses, breed with relative ease. Others, such as angelfish, may spawn in aquariums, but their young are so poorly developed when they hatch that it is extremely difficult to raise them successfully.
Fish have colonized almost every aquatic environment on the planet. Blackfin Icefish inhabit the freezing depths of the Antarctic Ocean, while Desert Pupfish thrive at over 104°F (40°C) in pools in the Nevada Desert. The huge diversity of fish habitats worldwide has driven the evolution of the countless shapes, sizes, and colors that make fish so fascinating to keep.