On 28th October the Spanish conservation and study group ‘Sociedad de Estudios Ictiológicos’ (SEI) released 1200 adult individuals of the Spanish toothcarp, Aphanius iberus, into a coastal lagoon within the protected ‘Espais Naturals del Delta del Llobregat‘ nature reserve, located close to Barcelona.
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This species is not a common aquarium species but is occasionally available from specialist retailers or breeders. It was initially named Adinia multifasciata by Girard (1859) before later being redescribed as Fundulus xenicus (mispelled 'Fundnlus') by Jordan and Gilbert (1882).
Body stout and trapezoidal in adults, body depth usually 2 to 3 times in standard length; scales large, fewer than 30 scales along midlateral scale row…
This species is also known as ‘Gardner’s Killi’ and ‘blue lyretail’ and the commonly-available aquarium forms are perhaps among the best choices for those new to keeping killifishes being relatively hardy, colourful and easy to breed.
A number of ornamental strains have also been line-bred by aquarists including ‘gold’ and ‘albino’.
Described from the Abanga River basin, a northern tributary of the middle Ogooué system in Gabon, western Africa. Current knowledge suggests it’s restricted to the area between the lower Mitmele River, Equatorial Guinea to the lower Ogooué in Gabon, including coastal drainages such as the Mbei, Komo and Gabon rivers inbetween.
Other members of the A. striatum ‘group’ of closely-related Aphyosemion species include A. exigoideum, A. gabunense (3 subspecies), A. microphthalmum and A. primigenium.
Perhaps looks best in a heavily-planted set-up or natural-style arrangement comprising a sandy substrate plus some driftwood roots and branches.
The addition of dried leaf litter would further emphasise the natural feel and as well as offering additional cover for the fish brings with it the growth of microbe colonies as decomposition occurs.
These can provide a valuable secondary food source for fry and the humic su…
Two new killifish species are described in the latest volume of the journal ‘Bonn zoological Bulletin’ this week.
A. gabunense is a good beginner’s killifish as it is not an annual species, being found in permanent bodies of water in nature. It exists in several geographical colour forms which are sometimes referred to the subspecies Aphyosemion gabunense gabunense, A. g. boehmi and A. g. marginatum. The latter two are slightly smaller with a maximum standard lenth around 45 mm, and all three can be told apart by differences in colour pattern.
This species is not an annual fish, being found in permanent bodies of water in nature. Over 20 different forms of it have been discovered at different localities and a handful have been given subspecific names. The most popular in the aquarium hobby include A. o. ottogartneri and A. o. pyrophore, both of which were initially described as separate species.
There exist several different colour forms of this species depending on collection locality, and these should not be kept together in order to prevent hybridisation and preserve bloodlines. It has been classified in the subgenus Chromaphyosemion by some authors who consider that nominal grouping to represent a monophyletic branch of a paraphyletic Aphyosemion.
The undescribed killifish commonly referred to as Aphanius sp. ‘Namak’ or ‘Namak River’ in the aquarium hobby has been formally named.