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In oviparous fish, internal fertilisation requires the male to use some sort of intromittent organ to deliver sperm into the genital opening of the female. Examples include the oviparous sharks, such as the horn shark, and oviparous rays, such as skates. In these cases, the male is equipped with a pair of modified pelvic fins known as claspers.
Pair bonding was formed quicker between larger fish, and there was a long delay in pairing for the most abundant sex in the OSR. In addition, this study showed that mango tilapia that mate within a similar size group have greater reproductive success .
For these animals, there is documented evidence of homosexual behavior of one or more of the following kinds: sex, courtship, affection, pair bonding, or parenting, as noted in researcher and author Bruce Bagemihl's 1999 book Biological Exuberance: Animal Homosexuality and Natural Diversity.
The center is formed with very fine sand particles with respect to the outer portion. It is now thought that they are the most ordered structures created by any fish. [4] [5] Movements of the white-spotted pufferfish for nest construction. The fish begins making the structure by forming a simple circle shape in the sand using its belly. [5]
Bonito is a popular food fish in the Mediterranean; its flesh is similar to tuna and mackerel, and its size is intermediate between the two. [6] Bonito under 1 kg (2.2 lb) or so (called palamut ~ паламуд in Bulgarian) are often grilled as steaks. Larger bonito (torik in Turkish) are cut into steaks and preserved as lakerda. [6]
A school of fish has many eyes that can scan for food or threats Pacific sardine school reacting to attention from yellowfin tuna. These sometimes immense gatherings fuel the ocean food web. Most forage fish are pelagic fish, which means they form their schools in open water, and not on or near the bottom (demersal fish). Forage fish are short ...
Perch is a common name for freshwater fish from the genus Perca, which belongs to the family Percidae of the large order Perciformes.The name comes from Greek: πέρκη, romanized: perke, meaning the type species of this genus, the European perch (P. fluviatilis).
Other fast moving fish such as Giant Danios can be used as dither fish. Also remember, if you have a breeding pair Convicts in a 40-gallon or smaller you will be most likely be unable to keep the convicts with any tank mates. But if your tank mates have established any type of dominance they will however breed and live together.