The low-down on loaches

THINK OF SOUTH American fishes and we mostly think of species from the Amazon basin. Like all river basins, the Amazon has an edge, in this case, one of those edges is the Guiana Shield, a region rich

ONE OF THE most mesmerising spectacles in the animal kingdom, is a group of fish swimming in unison. Almost as though they are a single entity, these synchronised fluid formations appear like choreogr

IN THE AUGUST ‘25 edition of PFK, I discussed at length one of my favourite oddball fish: the urchin clingfish, scientifically known as Diademichthys lineatus. In said article, I mentioned that althou

WAY BACK WHEN I first started keeping fish I was instantly drawn to, what were at the time, the genus Corydoras. Their cute demeanour and the constant shuffling over the substrate had me captivated in

An ecosystem evolves across thousands of years, a biological interaction that is both intricate and fragile. The arrival of a new species can disrupt the balance, as we have seen in Britain with grey

DR PETER BURGESS Peter is our disease expert. Send questions his way if you have pathogen problems. BOB MEHEN Bob is a master of fishkeeping general knowledge and community tanks. JEREMY GAY Jeremy is