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Livebearers are fish that retain their eggs inside the body and give birth to live, free-swimming young. They are especially prized by aquarium owners. They are especially prized by aquarium owners. Among aquarium fish, livebearers are nearly all members of the family Poeciliidae and include: guppies , mollies , platies and swordtails .
The eggs have an average diameter of 1 millimetre (0.039 in). The eggs are generally surrounded by the extraembryonic membranes but do not develop a shell, hard or soft, around these membranes. Some fish have thick, leathery coats, especially if they must withstand physical force or desiccation. These type of eggs can also be very small and ...
Adult fish also prey on fish eggs and larvae. For example, haddock were observed satiating themselves with herring eggs back in 1922. [14] Another study found cod in a herring spawning area with 20,000 herring eggs in their stomachs, and concluded that they could prey on half of the total egg production. [17] Fish also cannibalise their own eggs.
Flagfish, native to south Florida, is another species of killifish commonly found in pet stores. They are useful in aquariums for algae control. The golden topminnow (Fundulus chrysotus) is also native to the United States and often available at auction, but care must be taken with these fish to stop them from jumping out of the tank. A firm ...
Sea-Monkeys is a marketing term for brine shrimp (Artemia) sold as novelty aquarium pets. Developed in the United States in 1957 [1] by Harold von Braunhut, they are sold as eggs intended to be added to water, and most often come bundled in a kit of three pouches and instructions. Sometimes a small tank and additional pouches are included.
Bamboo Shrimp need stable water conditions, and they do best in well-established aquariums, like one of the best tropical fish tanks, that have lots of plants and places to hide. 16. Mystery Snails
The eggs are pale yellow, about 2 mm (0.08 in) in diameter, and strongly adhesive. During a spawning event, a female can deposit up to 740 eggs in separate clutches of 10 to 300 eggs at a time. [13] The eggs adhere to plants, algal mats, empty mussel shells, sand, or mud at sites that are reached by water only at high spring tides. [13]
A fairly large marine fish for the aquarium with a royal blue body, yellow tail, and black palette design on their body. A star on the silver screen, as Dory in the Disney/Pixar movie Finding Nemo .