Monday, 26 December 2016
Is this the rarest cichlid or fish?
Tuesday, 12 August 2014
Lake Apoyo the enigmatic Nicaraguan crater lake.
Lake Apoyo is a tiny crater lake in Nicaragua. Lying just a few kilometers south east of lake Apoyeque it has surface dimensions of two by three kilometers. The lake has no inflow or outflow and is entirely self filling. The lake is also fairly young.
Amazingly the lake holds 7 species of cichlid including Hyphsophrys nicaraguensis, Hyphosphrys neetroplus, Parachromis dovii and a beautiful strain of Amatilania nigrofasciatus as below and others including the pictured Amphilophus sp - the lake's endemic midas cichlid as pictured below.
The lake is young - an estimate is less than 20,000 years and has showed rapid speciation in the fish such that some have become unique species like A. xiloaensis which is genetically separate from the midas cichlids of lake Apoyeque and other lakes and rivers of Nicaragua.
So how did the fish get there? This is a really mystery. As we know with no out fall or in flow the lake is unconnected so could they have arrived when lake Apoyewue flooded? Another theory is young were dropped by birds and colonised or they were transplanted by humans - a possibility but unlikely as the lake is somewhat inaccesible and very craggy. So will this mystery be solved?
Sunday, 22 June 2014
A Central American Eartheater
Astatoheros altifrons is a stunning cichlid from Central America.
Fairly uncommon it is a good representative of the Central American family of eartheaters - the Astatoheroines. A good example of covergent evolution - these fish greatly resemble the Satanoperca of Amazonia. Although these families are not closely related. They are ideally huilt for their lifestyle having a long snout with eyes set far back. To feed they seem to hover above the substrate and then divebomb so their snout is buried to the eye - hence having them set far back on the head.
For Central American cichlids these are very peaceful and often fair poorly alongside boisterous tankmates. They are tricky to breed but follow the general process for breeding Central American cichlids.

