Results for “spawn”

One of the most popular Tanganyikan species in the hobby, N. leleupi is a stunning fish when in good condition. However, it is not as easy to maintain as its popularity suggests, due to its disagreeable attitude towards conspecifics and its sensitivity to deteriorating water conditions. It is a solitary species in nature, with male fish entering females' caves as they find them and spawning with receptive females. This explains the weak pair bond formed by spawning fish in aquaria and also ...

Bitterlings (see 'Notes') exhibit an unusual spawning symbiosis in which the interlamellar spaces of the paired inner and outer gills of living unionid mussels are used as a spawning substrate. During the reproductive period females develop a long ovipositor which is used to deposit eggs through the mussel’s exhalant siphon. Males then move in to males release milt...

This rich feeding ground is exploited until the sea water returns, at which point the catfishes begin to migrate upstream in massive numbers, moving up the Amazon and its tributaries. Sexually mature individuals are not normally recorded during these events so they're thought related to feeding and dispersal rather than spawning. The fish are subject to intensive capture by commercial and artisanal fishing operations during this upstream movement.

This species is also known as the 'spraying', 'splashing' or 'jumping' tetra and these names are also sometimes applied to its congeners although none of them exhibit a comparable spawning strategy, simply depositing their eggs among vegetation at or around the water surface.

C. afra is easily confused with some species of Pseudotropheus, but can be distinguished by its smaller adult size and unicuspid (as opposed to bicuspid) teeth. Also in this species the black bars on the flanks continue into the dorsal fin, unlike in Pseudotropheus zebra, for example. It exists in many different colour forms in nature. These forms should not be mixed in aquaria as they may spawn with each other, producing unwanted hybrid fry. Despite this ability to interbreed, it's probabl...

This species is very rarely-traded since collections of fishes for commercial purposes aren't common in Suriname. It's a member of the nominal G. surinamensis 'group' of closely-related species within the genus and can be identified by a combination of characters including: no dark preopercular marking; six vertical/parallel bars on each flank (normally visible only when the fish are stressed, spawning or preserved); dark, squarish lateral spot positioned within the third vertical bar; sixth (posterior) bar elongate an...

It's a member of the nominal G. surinamensis 'group' of closely-related species within the genus and can be identified by a combination of characters including: presence of dark preopercular markings; seven parallel vertical bars on each flank (normally visible only when the fish are stressed, spawning or preserved); vertical bars four and five meet in such a way that they form a 'Y' shape; dark lateral spot positioned within the third vertical bar; caudal fin reddish with variable pattern of iridescent blue spots and stripes.

This species is rare in the hobby although other species are sometimes sold under the name. It's a member of the nominal G. surinamensis 'group' of closely-related species within the genus and can be identified by a combination of characters including: possession of dark preopercular marking; four parallel, ventrally-inclined bars on each flank (normally visible only when the fish are stressed, spawning or preserved); dark lateral spot positioned within the second vertical bar; caudal fin red with variable pattern of large, iridescent blue to white spo...

The Pearlscale Cichlid is an extremely attractive fish, showing some gorgeous bluey green hues and reflective flecks on their flanks. They aren't difficult to look after or breed, but be careful when choosing tankmates. The only problem with spawning is that the male may become aggressive towards the female - it is certainly wise to have a tank divider, just in case. Look out for Pearlscale Cichlids labelled as Texas Cichlids, as it is a misleading common name that is often given to Heri...

Contrary to many reports, including a number of scientific papers, this species breeds in the same way as other cyprinodontids and does not dig pits or exhibit extended parental care. It's a fractional spawner with females depositing eggs on a more-or-less continuous basis when a warm temperature is maintained though ideally it should be permitted to breed on a seasonal basis in spring and late summer as it would in nature.

In nature, the spawning nests of large male fish may measure several meters across and contain hundreds of snail shells. Interestingly, when they are protecting brooding females males do not eat and eventually become so weak that their territories are taken over by stronger fish. Immature and sub-dominant males can be seen over areas of open substrate where they feed voraciously in large shoals. Females are only ever found in areas containing the nests of dominant males. It appears that the ...

This uniquely-shaped rainbow is an uncommonly seen species in the hobby, mainly because it hails from such a remote area in Australia. It is currently listed on the IUCN list of threatened species as being at risk, so all attempts at captive spawning are to be encouraged....

A good species of gudgeon for the beginner, being tolerant of a wide range of water conditions, hardy and easily bred. We've even seen them spawning in dealer's tanks on more than one occasion. It's easily confused with the similar looking, but rarer Southern purple spotted gudgeon, Mogurnda adspersa, a fish which is now being farmed for the trade despite being endangered in nature....

N. boulengeri can be distinguished from the similar N. hecqui and Lamprologus kungweensis primarily by the orange border on the dorsal and anal fins, although its adult patterning is somewhat different to the other species. Unlike many other shell dwellers, it will spawn in small caves if no shells are made available....

During winter months N. delicata retreats to streams or underflows where it remains dormant between October and April (Kano, 2000) before emerging to spawn. Other species living alongside it in nature include Rhinogobius flumineus, Cottus pollux and Phoxinus spp. Niwaëlla is closely related to Cobitis and N. delicata, also the type species, was described as C. delicata (Niwa, 1937). The combination of characters used to tell it...

Utilises a strategy which has become known as 'pelvic brooding'. Spawning tends to occur in the early morning, with dominant males darkening in colouration and defending their space by driving away potential competitors, while approaching ripe females in a rigid 'head-down' position. The eggs normally number 8-12 and are expelled as a single mass while being fertilised simultaneously, after which they continue to hang from th...

This fish is spawned very infrequently in captivity but some reports have been made. Fish are sexually mature from 4" and a pair should be obtained by growing on a group of youngsters and allowing a pair to form naturally. Once this occurs the other fish will most likely be eliminated so it is wise to be vigilant in order to avoid uneccessary losses. Apparently courtship occurs in an open section of water surrounded by floating plant material. The courtship consists of the fish circling ...

Parachromis Managuense are your typical north/central American large predatory cichlid. They are extremely attractive, but a large aquarium is required. They are not difficult to look after, as long as filtration is up to standard. Choose tankmates carefully - if you are hoping to breed Managuense, house a breeding pair or grow 6 juveniles up until a pair is formed. One of the biggest problems with breeding Managuense is the fact that a single spawn from 12" parents can produce 3000 f...

P. motoro is one of the most popular members of the genus with aquarists. Whilst it is quite easily obtainable and hardy once settled in, it does grow very large so make sure you can house it adequately long term. It should also be noted that the males of this species are among the most violent when in the mood for spawning and females can end up on the wrong end of a serious beating. If you're keeping a pair or group of these keep a close eye on proceedings and be prepared to separate them...

Protomelas sp. "steveni taiwan reef" is often sold as a subspecies of P. fenestratus, but is actually thought not to be synonymous and is currently undescribed. It can be distinguished from similar species such as P. fenestratus and P. taeniolatus by the bright redof adult males. None of these related species or morphs should be kept together in aquaria as they may hybridise. Some captive spawns of this species have resulted in albino fry. It is one of the more popular and readily a...