A clown killifish needs one or two small meals a day, each cleared within a couple of minutes, and almost all of that food must arrive at the surface. This miniature killifish, banded in black and gold with a lyre-shaped tail, lives in the top inch of slow forest streams, its mouth turned upward to snap insects from the underside of the water's surface. Feed it like a bottom or midwater fish and it can starve in a tank full of food.
An Upturned Mouth Decides the Menu
Everything about this species points up: the flattened head, the high-set eyes, the habit of hanging motionless just below floating plants watching for movement. Offer fine floating micro pellets, flake crushed small enough to stay afloat briefly, and live or frozen foods that linger in the surface film — baby brine shrimp, daphnia, and tiny insect larvae are taken with quick, precise strikes. Sinking pellets and bottom wafers are effectively invisible to it, so in a community tank the clown killifish's ration has to be delivered on top, deliberately, before faster fish clear the surface.
How Much Fits a Very Small Fish
An adult is only a few centimetres long, so a meal is a modest pinch scattered across the surface, not a spoonful. Feed a small group twice daily in breeding or growth condition, once daily for maintenance, always judging by the rule that leftovers floating after a few minutes were excess — skim or siphon them away rather than leaving them to film over the surface, since a scummy surface also blocks the gas exchange this top-dweller depends on. Males in full colour and females rounding with eggs are the visual confirmation the ration is right.
Protecting Its Feeding Space
Clown killifish are peaceful but easily outcompeted and easily startled, and strong filter flow sweeps their food into corners and down intakes before they reach it. Baffle the outflow or switch the filter down at feeding, keep floating plants that give them shade and confidence at the top, and feed them at the quiet end of the tank away from boisterous surface feeders. They are also exceptional jumpers that find gaps around lids, so the same tight cover that keeps food in keeps the fish in — check it after every feed.
Live Food and Long-Term Condition
A diet of dry food alone keeps this killifish alive, but live and frozen foods keep it coloured, active, and breeding, matching the insect-rich surface diet it evolved for. Rotate what you offer across the week rather than feeding one item exclusively, and watch for the fish that hangs below the group, thin and uninterested: in a surface specialist, missing meals shows quickly, and that individual may need food pipetted directly over its hiding spot while you look for a cause such as bullying or illness.
A Surface Routine Worth Logging
Meals this small and position-specific are easy for a second person to repeat or miss entirely. KinsLe's Care Teams let a household assign each clown killifish feed to a named helper and mark it complete with a timestamp, keeping the surface routine exact even when the usual keeper is away.