The long game
What actually predicts an adult who cares: free time outdoors, and one adult who cared in front of them.
The hope under this whole section is that a child who keeps a tank becomes an adult who gives a damn about water. That question has been asked properly, and the answer is real. It is just not quite the answer you would put on a box.
Ask adults who have given their working lives to the environment where it started, and two answers come back far ahead of everything else. Hours and hours of unstructured time outdoors as a child. And one family member who paid close attention to the natural world and let it show.1 Teachers, books, organizations and watching a loved place get wrecked all appear further down, and they tend to belong to later chapters of the story rather than its opening.
Notice what is not on that list. Nobody says “my mother had very high standards for my aquarium.”
The largest survey of it
Wild nature and tame nature are not the same thing
Woods, hiking and fishing before about the age of eleven track adult environmental attitudes and behavior. Gardening, picking flowers and looking after plants indoors track them more weakly and less consistently.2 An aquarium sits squarely in the second, weaker group. That is an uncomfortable finding for a fishkeeping site and we would rather print it than hide it. It is also exactly why the pond jar, and the walk to the river that fills it, are on this page at all.
The adult end of the chain
Feeling connected to nature does track behavior
People who feel connected to the natural world act on it. Across 37 samples and 13,237 people the association comes out at r equals 0.42, 95 percent confidence interval 0.36 to 0.47.3 That is a strong number for this field. It is also a correlation, and the arrow could run the other way just as easily: people who already act may simply feel more connected afterwards.
And the thing that keeps them going
Competence and hope, not alarm
What keeps a child acting is contact with living things, a sense that she can do something, and a reason to think it is worth doing. Information about loss, on its own, does not do it.4 A child who has kept something alive has evidence about herself. A child who has been told the oceans are dying has a fact she cannot act on.
Why this is a pattern and not a proof
Almost all of it is people looking backwards and explaining themselves, and people are very good at building a tidy origin story after the fact. The samples start from the answer, too: the classic studies interviewed people who had already become environmentalists, which tells you nothing about how many children had exactly the same childhood and became accountants. The author of that work published a reply to five critical commentaries on precisely those grounds.1 Nobody has run the experiment, because the experiment is a forty year randomised trial of childhoods, and nobody ever will.
Consistent, and not proof The same answer every time it is asked, always looking backwards
What this will carry: free, repeated, unsupervised-feeling contact with living things, next to an adult who visibly cares, is the childhood that people who act on the environment describe. What it will not carry is a promise, a timetable, or the claim that an aquarium in particular does it. The most defensible reading happens to be the most useful one for a parent standing in front of a tank full of blue gravel. The modeling matters more than the styling. Let her play, and let her watch you be careful with the water.
The claim everyone makes
A pet teaches responsibility. The true version is smaller than that, and better.
It is the reason most people give for buying a child an animal. It was the first reason the owner of this site gave when he asked for this page. So it gets the same treatment as everything else here.
The short answer: children with pets do come out ahead on some emotional and social measures. Responsibility itself has barely been studied, the studies that exist are weak, and the one piece of work that asked children directly what they actually do found that in plenty of households the answer is: not much, because a parent does it.
| What is known | Where it comes from | How strong |
|---|---|---|
| Children with pets report higher self esteem, less loneliness, and more social confidence | A systematic review of 22 studies, with wide inclusion criteria because the field is still young.5 | Mixed |
| On behavior, and on anything that looks like responsibility, nobody can yet say | The same review says so plainly, blames the shortage of high quality research, and asks for proper prospective studies on every outcome it looked at.5 | Good |
| The wider writing on animals and child development is warm in its conclusions and thin in its methods | One review opens by describing most of the studies it summarises as methodologically weak, and then concludes in favor anyway.6 | Mixed |
| Ask the children and a lot of them say the care work is done by a parent, and their own job is playing | Interviews with children about what they really do for the family pet. The title is one child’s answer: “Mum cleaned it and I just played with it”.7 | Good |
| The general “pet effect” on human wellbeing is patchy, and the cheerful results get published louder than the null ones | A review of the whole field arguing that the popular version has run well ahead of the evidence.8 | Good |
| Whether keeping an aquarium changes a child’s responsibility, by any measure at all, has never been tested | Nobody has run it. The same hole sits under the psychology page for adults, and it is wide open for anybody who wants it | Untested |
Three things to do with that
Stop waiting for the animal to do the teaching. A fish cannot teach anything. It can supply a job that is real, small, repeating, checkable, and that somebody notices. The teaching is done by the adult who set that job up and then does not quietly do it himself at eleven at night when she forgot. That is a much smaller claim than the one on the shop wall. It is also the only one that is in your hands.
Plan to do most of it yourself. Not as a defeat. As a design assumption. The households where this goes wrong are the ones where a parent expected a fifty fifty split, felt cheated, and turned the tank into a reason to nag. Take the tank, give her one visible piece of it, and you can both succeed. Do it the other way round and an animal pays for the mismatch.
Do not buy an animal as a teaching device. It is the one purchase where a failed lesson is paid for by something alive. That is part of why the fish finder exists: it flags 21 of its 110 species as routinely mis-sold, which nearly always means sold to a beginner for a tank that cannot hold them. A first fish chosen badly teaches nothing about responsibility. It teaches that animals die and nobody is to blame.
Thin evidence, clear conclusion The claim is popular; the research behind it is not there yet
What we will say: an aquarium is a very good home for one specific, bounded, daily job with a consequence a child can see, and a child given a job like that keeps doing it as long as nobody takes it back. What we will not say, because nothing supports it: that keeping fish makes a child more responsible in general, that it carries over to homework, or that the animal is the active ingredient. If she ends up more careful, the likeliest reason is that somebody was careful in front of her every week for a year.
- Chawla, L. (1999). Life paths into effective environmental action. The Journal of Environmental Education 31(1), 15 to 26. doi.org/10.1080/00958969909598628. With Chawla, L. (1998), Significant life experiences revisited, Environmental Education Research 4(4), 369 to 382, doi.org/10.1080/1350462980040402, and Chawla, L. (2001), Significant life experiences revisited once again: response to five critical commentaries, Environmental Education Research 7(4), 451 to 461, doi.org/10.1080/13504620120081313. The third is cited specifically because it is the author answering the methodological objection this page repeats. paywalled
- Wells, N.M. and Lekies, K.S. (2006). Nature and the life course: pathways from childhood nature experiences to adult environmentalism. Children, Youth and Environments 16(1), 1 to 24. doi.org/10.1353/cye.2006.0031. The wild versus domesticated nature distinction, and the finding that the domesticated category is the weaker predictor. Retrospective survey. paywalled
- Whitburn, J., Linklater, W. and Abrahamse, W. (2020). Meta-analysis of human connection to nature and proenvironmental behavior. Conservation Biology 34(1), 180 to 193. doi.org/10.1111/cobi.13381. 37 samples, n equals 13,237, r equals 0.42, 95 percent CI 0.36 to 0.47. Correlational. paywalled
- Chawla, L. (2020). Childhood nature connection and constructive hope: a review of research on connecting with nature and coping with environmental loss. People and Nature 2(3), 619 to 642. doi.org/10.1002/pan3.10128. open access
- Purewal, R., Christley, R., Kordas, K., Joinson, C., Meints, K., Gee, N. and Westgarth, C. (2017). Companion animals and child/adolescent development: a systematic review of the evidence. International Journal of Environmental Research and Public Health 14(3), 234. doi.org/10.3390/ijerph14030234. PMCID PMC5369070. Twenty two studies met the criteria, which were deliberately broad because the field is early. Source both for the positive associations and for the review’s own statement that behavioural findings are unclear owing to a lack of high quality research, and that prospective studies controlling for confounders are needed across every outcome. open access
- Endenburg, N. and van Lith, H.A. (2011). The influence of animals on the development of children. The Veterinary Journal 190(2), 208 to 214. doi.org/10.1016/j.tvjl.2010.11.020. PMID 21195645. Cited for both halves of its own abstract: the conclusion is favourable, and the second sentence describes most of the studies reviewed as having methodological shortcomings. paywalled
- Muldoon, J.C., Williams, J.M. and Lawrence, A. (2015). “Mum cleaned it and I just played with it”: children’s perceptions of their roles and responsibilities in the care of family pets. Childhood 22(2), 201 to 216. doi.org/10.1177/0907568214524457. Children interviewed about their own pet care. The single most useful counterweight to the responsibility claim, and the reason this page tells parents to plan on doing most of the work. paywalled
- Herzog, H. (2011). The impact of pets on human health and psychological well-being: fact, fiction, or hypothesis? Current Directions in Psychological Science 20(4), 236 to 239. doi.org/10.1177/0963721411415220. The standing sceptical review of the pet effect. paywalled
Continue
Where to go next.
Thirty reasons, graded
Thirty reasons to keep a tank with the evidence beside each one, which is the same method applied to adults.
The purple castle
Why ownership is what the evidence keeps pointing at, and what that means for who chooses the castle.
For children
The whole argument, and the nine sentences to say while standing in front of the castle.
A jar from a pond
The cheapest way to test any of this: a two litre jar of pond mud that a child can run alone.