On my desk is a 30" tank containing a solitary female Ramarizi dwarf cichlid, a thriving colony of guppies, which are, nominally at least, the property of my eldest stepdaughter, and since Sunday night, six knife (or knife-edge) livebearers, an unjustifiably obscure species from Central America, which I have to say that I had never heard of before bidding three quid for an immature trio.
It is interesting to watch them alongside the guppies because although superficially similar, they are much sleeker and much more predatory in appearance, and swim in a much more determined and forthright manner.
In the picture the two lighter-coloured fish are fully grown female guppies, and I think that the difference between the two species is very marked.
As regular readers of the CFZ Bloggo network will be aware. Jeanett Thomas (48) 
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In November Sahar Dimus, our guide on four CFZ Sumatra expeditions, died of liver failure leaving a widow Lucy and four Children. On the 2nd November, Dezyama D. Sangma, wife of our friend and colleague Dipu Marak, our collaborator on the 2010 Indian expedition died, leaving her grieving husband and two small children.
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