3,895 answers about fish & aquatics
A healthy aquarium is a balanced one — water chemistry, filtration, stocking and feeding all work together, and most fish problems start with the water. This page gathers the fish and aquatics library of KinsLe Answers in one place, organized by topic for freshwater and saltwater keepers alike. Every answer is original, written by KinsLe, and tied to a real KinsLe feature.
212 answers in Behavior & Training — page 2 of 9
A corydoras catfish needs no handling and no play sessions — its contentment is social and bottom-based: a group of six or more of its own kind, soft sand to sift, and food it can forage for. Corydoras rest in piles, explore together, and grow visibly bolder in proper numbers; a lone cory stays stressed whatever…
A cherry shrimp needs no play and absolutely no handling — a cherry shrimp out of water or in a net is a shrimp in danger, not a shrimp being entertained. Contentment for this tiny algae-grazer means a stable, mature tank with plants, moss and grazing surfaces, a colony of its own kind, and keepers whose main…
A celestial pearl danio needs no play or handling from you at all — its social life happens entirely inside the tank, with its own kind. This tiny, shy schooling fish stays content in a group of six or more, ideally ten-plus, in a planted tank where it can display, chase and retreat among the leaves. Your interaction…
A betta needs no handling at all — hands and nets outside feeding or tank work only stress it — but it thrives on short bursts of visual interaction, roughly five to fifteen minutes of focused attention a few times a day. Bettas are curious, people-aware fish that learn feeding routines, follow a finger along the…
Norman's lampeyes are independent fish rather than affectionate ones, and they do not bond with owners the way a dog or even a large cichlid might. They do learn the feeding routine, gather near the surface when you approach at mealtimes, and grow calm around familiar movement outside the glass. That recognition is…
A Norman's lampeye is a lively, active little schooler that spends much of the day cruising just below the surface and darting after tiny foods. Its playfulness shows as group movement rather than tricks: the school shifts, splits, and regroups around plants and light. Kept singly it turns shy and still, so its energy…
Rice fish are independent rather than affectionate: they do not bond with an owner the way a dog or even a hand-fed larger fish can, and they neither seek touch nor miss company beyond their own school. What they do offer is recognition of routine, gathering at the surface when the feeding person approaches and…
A rice fish is quietly active rather than playful in the way a puppy is: a healthy school cruises the upper water almost all day, weaving through plants, sparking small chases, and rushing up together at feeding time. Play, for a rice fish, looks like males displaying to each other and the whole group exploring after…
White cloud mountain minnows are independent fish that show no affection as a pet mammal would, though a confident school quickly learns to associate its keeper with food and will swarm eagerly to the surface at feeding time. They do not recognise individual people so much as routines, shadows, and the rattle of a…
A white cloud mountain minnow is one of the livelier small fish, swimming actively through the middle and upper water for much of the day and chasing briefly during male displays. Its play is social rather than object-based: sparring without contact, racing the current, and rising together at feeding time. Scheduling…
Least killifish are firmly on the independent side, showing no real affection toward owners and often sheltering in plants when a shadow falls over the tank. At most, a settled group learns that a person at the glass can mean food and will gather loosely near the surface at feeding time. For questions about reading…
A least killifish is quietly active rather than playful in the boisterous sense, spending its day picking through plants, grazing surfaces, and making short darting trips between patches of cover. Males add bursts of courtship chasing, but the group as a whole stays gentle and unhurried, especially in a densely…
Endlers are independent in the way all small fish are — they cannot bond, cuddle, or be handled — but they are far from indifferent: they quickly learn who feeds them and will gather at the glass, bright and expectant, when their keeper approaches. What looks like affection is really a confident feeding association,…
A threadfin rainbowfish is gently active rather than boisterous, gliding around the upper and middle water in a loose school with constant soft movement. The males supply the play: they raise their long, thread-like fins and perform slow, hovering courtship dances, fluttering around females in a display that looks…
A sparkling gourami is moderately active and quietly playful, wandering the whole tank to inspect plants, poke at the substrate and investigate anything new. Males add real theatre: they flare their iridescent fins at each other, can produce faint croaking sounds during displays, and a settled male builds a small…
A scarlet badis is slow and deliberate rather than playful, spending its day prowling through plant thickets in short, stop-start advances as it hunts for microscopic prey. Males provide the drama, flaring their red-barred flanks at each other along territory edges, while females stay paler and slip quietly through…
A rummy-nose tetra is an active, social fish whose play is a group performance: a proper school swims the middle of the tank in tight formation, turning together in one smooth motion and patrolling back and forth for hours. Individual rummy-noses are not bold, but the school is constantly on the move, breaking…
A pea puffer is highly active and genuinely playful, patrolling its planted territory with a hovering, helicopter-like swim and inspecting everything new with obvious curiosity. It hunts constantly, peering under leaves for tiny snails, and most pea puffers learn to recognise their keeper and hover at the front glass…
A nerite snail is active without being playful: it spends long stretches on slow, steady rounds of the tank, rasping algae off glass, stone and plant leaves with hardly a pause. You will find it in a different place every time you look, often working the front glass in the evening, then disappearing under a leaf or…
A licorice gourami is neither very active nor playful in any obvious way, and that quietness is healthy for this tiny blackwater fish. It hovers in shaded plant cover, moves in short careful glides, and saves its energy for slow fin-spreading displays when a male meets a female or a rival near his chosen shelter.…
A hillstream loach is busy rather than bouncy, spending most of its waking time gliding over glass, stone and wood while grazing the film of algae and microorganisms that coats them. It plays in moving water, letting the current push it along a rock before gripping again, and two loaches will shuffle and bump over a…
A fork-tail rainbowfish is one of the liveliest small fish you can keep, spending the day darting around the upper water in a tight school. Males constantly flash their yellow-edged fins at each other in brief, harmless sparring bursts, and the whole group surges toward the front glass at feeding time. Keep at least…
A discus is calm and stately rather than playful, gliding slowly through the middle of the tank in a loose group and spending long periods hovering together. Its interest shows as intelligence and recognition: discus learn their keeper, gather at the front at feeding time, and squabble mildly over rank and the best…
A clown killifish is playfully active at the surface, patrolling just under the waterline, sparring gently with rivals, and investigating anything that lands above it. Males with their lyre-shaped, banded tails display and chase in short bursts, while the group spends quieter spells hovering among floating plants. For…
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