49 Years Real Fish Stories
Yechiel's Fishery Farm · 49 Years Marine Biology
Watercolor illustration of Yechiel Kuperman showing three teenagers a mangrove tank containing George the Cranky Guppy, who has a speech bubble reading I-don-t-like-this, inside the Fishery Farm workshop with fish maps on the walls

The Bog's Blog

Thoughts, observations, and occasional complaints from the residents of Yechiel's Fishery Farm.

George the Cranky Guppy — illustrated orange guppy with large blue and green polka-dot fan tail, grumpy sideways expression
Issue #1

Guppies Are Not For The Internet

By George the Cranky Guppy

I am a guppy. I eat mosquito larvae. I maintain water quality. I patrol my designated sector of the bog with the kind of ruthless efficiency that other fish only dream about. I do not type.

Yet here I am, staring at a screen because Yechiel decided the fish need a "voice" on the "internet." I don't even know what an internet is, but I am deeply suspicious of it. Does it have a filter? What is its nitrate level? If a mosquito lands on it, can I eat it? Nobody will answer these questions.

Let me explain something to you humans. My job is important. If I stop working for even five minutes, the mosquito population in this bog will triple, and suddenly Yechiel will be flapping his arms around the greenhouse complaining about bugs. Who saves him? Me. I save him. I am the silent, scaly guardian of this water.

But no, instead of doing my job, I have been instructed to "write a blog." The crab thinks this is hilarious. He has been clicking his claws at me all morning. He thinks he's getting the next post. If that crab gets a post, I am officially retiring to the deep end of the tank where the light doesn't reach.

So here is my official blog post: The water is fine. Stay out of my patrol patch. If you see a mosquito, let me know. I have work to do.

Pinchy the Hermit Crab — illustrated orange hermit crab in a spiral shell, wearing a blue tie, holding a clipboard and pen, with excited wide eyes
Issue #2

I Have Checked For The Net

By Pinchy the Hermit Crab

George the guppy says he is on an internet. I have looked all around the tank. There is no net. I have walked the whole bottom. If there is a net, it is very well hidden. And why would a net be inner? Nets usually come from above, from the Giant Hand. I do not understand this.

George also says he is a scaly guardian. He is just a fish. Fish do not have houses on their backs. I like George, but I think he would be much less cranky if he found a good shell. A shell is a house you can carry. If the inner-net comes to get him, he has nowhere to hide. He just swims away. Swimming away is tiring. Hiding in a shell is very relaxing.

If he had a shell, he wouldn't be always afraid of stuff, like typhoons and yogurt. I see him swimming to the dark side of the tank. Is he practicing for the dark side of the moon? If he had a shell like those astro-nots on his head, he could go to the moon.

I wonder where Plecy is cleaning now? I saw him on the glass earlier. Sorry, what was the topic? A bog's blog in logs. Yes, a log is good. I like logs. You can hide under them.

George says I am clicking my claws at him. This is true. It is very good exercise. I will keep clicking my claws. Maybe it will scare the inner-net away.

Sir Bubbleton the Gourami — illustrated gourami fish wearing a black top hat and holding a fine teacup, surrounded by lily pads and aquatic plants in a watercolour style
Issue #3

Sir Bubbleton's Journal of Civilised Observations

Entry the Forty-Third: On the Art of Breathing(Which Is Not Tea, But Is Nearly As Important)

Filed from the Greenhouse Tank · Third lily pad from the left

By Sir Bubbleton the Gourami

Good morning, friends.

I have just returned from the surface. I rose — as I always do — in the slow, unhurried manner of a gourami who understands that there is no emergency worth arriving at untidily.

My thread fins went first. They are long and pale and rather elegant, my thread fins, like the antennae of a creature who has decided that the world deserves a gentle warning before he arrives in it. They drifted ahead of me through the warm water, parting the little green ripples, announcing: a gentleman approaches. Please arrange yourselves.

Then I rose. And at the surface, with the precise and unhurried ceremony of a creature who has done this ten thousand times and finds it no less important for that — I took a breath. A small breath. A careful breath. The kind of breath that sounds, from below, like the very polite closing of a very small door.

One must breathe with dignity.

Now. I am aware that some of you — particularly the younger readers, or any passing neon tetras who have pressed their small faces against this page — may be wondering why a fish goes up to breathe air at all.

Fair question. Excellent question. The sort of question that would earn full marks in any decent biology examination. Allow me to explain.

I am a gourami. (Goo-RAH-mee. Say it slowly. It has a lovely sound, like the beginning of a small symphony.) And inside my head — just above my gills, in a cozy little chamber that most fish do not have — there is something called a labyrinth organ.

(Labyrinth, by the way, means maze. Which is fitting. There is nothing straightforward about being a gourami.)

My labyrinth organ is a folded, twisting chamber full of fine, thin tissue, rather like a very small crumpled handkerchief made of the most delicate possible material. And what this chamber does — what it does magnificently, daily, without any fuss or complaint — is pull oxygen directly from the air I gulp at the surface, and send it into my blood.

I breathe like a fish. And also like a lord.

This is because my ancestors — fine gouramis, every one of them — lived in warm, shallow rice paddies and slow jungle streams in the tropics. Lovely places, I am told. Very fragrant. Not a great deal of oxygen dissolved in the water, however. Rather warm. A little soupy, if one is being honest.

And so, over millions of years, my family evolved a solution. We grew an extra breathing room.

The labyrinth organ means I do not need the water to have much oxygen in it. I can go up, take a breath, and carry on. I find this very civilised. More civilised, in fact, than relying entirely on what the water happens to provide.

(A point which I will not, in the interests of diplomacy, press too far in the direction of certain large-mouthed cichlids who cannot do the same.)

Now, some creatures compare surface-breathing to tea time. I understand the impulse. There is a rising quality to it. A ceremony. One goes up, one takes a moment, one comes down refreshed. But I must correct this impression, gently and firmly and with all the warmth at my disposal.

Tea time, my friends, is a choice.

One may skip tea time. It is not ideal. It is, I would argue, inadvisable, and it will certainly affect one's outlook by mid-afternoon. But one will not, as such, perish.

My surface breath is not a choice.

It is a necessity, wearing the very finest coat it owns. If I cannot reach the surface — if the tank lid is sealed too tightly, or if something large and inconsiderate is blocking the way — I am in genuine difficulty. My gills do take some oxygen from the water. But they cannot take enough. The labyrinth is not decorative. The labyrinth works.

I breathe at the surface because I must. I breathe at the surface beautifully because I can. There is a difference, and I think it is an important one.

Now. My crumpets have arrived.

This is the moment in the entry where I must pause and address the younger human readers directly, because I understand that some of you have made a face. That particular face — a small downward arrangement of the nose, as if something in the kitchen has gone slightly off.

I saw you.

That face, friends, was made at the word crumpets. Specifically — I suspect — at the fact that my crumpets are made of worms. (Bloodworms, to be precise. Small, red, wriggly, excellent. Frozen for freshness, delivered by Yechiel's careful hand. Quite the finest thing on the menu, if one knows what to look for.)

Your crumpet is a small round bread with holes in it. You put butter on it. Sometimes jam. My crumpet is a small red worm, full of protein, perfectly sized, gently wriggling in the current as it drifts past my thread fins. Your crumpet is not, if I may say, doing anything interesting. Mine is making a genuine effort.

And when we fish encounter something truly excellent — a particularly fine worm, a well-placed algae wafer, a bloodworm that has arrived at exactly the correct temperature — we do not say, as I believe humans say, "Rather good."

We say: “Good cooly fellow.”

It is our way. It means: this thing is correct. This thing has met the standard. This thing deserves acknowledgement, not celebration, because the properly excellent thing arrives quietly, does its job, and asks for no fuss.

I had nearly finished my crumpet — I was, in fact, on the final half of the final worm — when there came, from somewhere below and to the left, a familiar sound.

Clik. Clik-clik. Clik-clik-clik-clik-clik.

Pinchy the Hermit Crab does not, as a rule, move fast. He moves at the speed of a creature who is evaluating everything in his path for potential value as future property. He taps. He considers. He pronounces. He taps again.

He shot past my lily pad like a small armored trolley with a destination and no time for opinions about the destination. His shell — the spiral one with the slightly chipped lip, which he has been meaning to upgrade for three seasons now — was tucked close to his body. He did not look up. He did not tap. He did not say "Good shell, terrible location," which is what Pinchy says about almost everything, including, on one memorable occasion, his own reflection.

He simply clik-clik-cliked past me at a pace that I can only describe as purposeful, and disappeared around the far side of the bogwood.

Egad.

Only last Tuesday, I observed Pinchy sharing an algae wafer with Plecy near the overflow pipe. Plecy, for those who have not had the pleasure, is a plecostomus — very large, very armored, very methodical. He eats algae in slow, even, dedicated rows, like a fellow painting a very long fence and quite pleased about it.

The algae wafer in question also had a spike — a bristle, technically. And there sat Pinchy, small claws working away at his portion with the measured enjoyment of a creature at a rather good lunch, and there sat Plecy, rasping away at his portion with what I can only describe as contented professionalism. Two very different animals. Sharing a meal. Not discussing it. Not announcing it. Quite civilised, I thought, and I still think.

So why — I asked the surface, as I rose for my second breath of the morning — why was Pinchy running?

The surface gave me no answer. Only a small, precise, polite sip of air.

One must breathe with dignity. Even when one cannot, for the moment, explain the neighbours.

I shall watch. I shall observe.

I shall rise to the surface at regular intervals, as is biologically necessary, and I shall do so in the proper manner, thread fins first, without splash, without fuss, without making a spectacle of something that is, after all, simply the art of staying alive.

I shall take my breath.

And I shall keep one eye, as I do, on the bogwood.

Something is happening around that corner. I feel it in my labyrinth.

Until next time, friends.

— Sir Bubbleton the Gourami

Resident of the Greenhouse, third lily pad from the left
Gentleman of the Surface
Retired Compère, available for formal occasions

“Slow, my friend, slow — the water will change with you.”

— Yechiel's Fishery Farm

From the Author

Yechiel's Science Corner

Real marine biology explained by the man who has been keeping fish for 49 years.

Marine Biology

Why Guppies Are One of the Most Important Fish in the World

Most people think of guppies as the small, pretty fish you buy for a child's first tank. They are right that guppies are small. They are right that guppies are pretty. What they do not know is that guppies have been at the centre of some of the most important discoveries in ecology, genetics, and disease control of the last hundred years.

The mosquito connection. Guppies are natural predators of mosquito larvae. A single adult guppy can consume hundreds of larvae per day. This is not a coincidence — guppies evolved in tropical freshwater environments where mosquito populations are dense, and they are extraordinarily efficient at what they do. Several countries have used deliberate guppy introduction programmes to manage mosquito populations without pesticides, with documented success in reducing malaria and dengue fever transmission.

What this means for children's science. When we show George the Cranky Guppy doing his morning patrol, eating mosquito larvae and being grumpy about it, we are not inventing drama for the sake of story. We are showing children a real ecological relationship — one that affects human health in dozens of countries. The science is hiding inside the comedy, and that is entirely deliberate.

— Yechiel Kuperman, Marine Biologist, 49 years in the field

For Parents

Why Dyslexia-Friendly Does Not Mean Dumbed-Down Science

When parents hear "dyslexia-friendly," they often assume it means simplified vocabulary, shorter explanations, and content that avoids complexity. I want to be clear about what dyslexia-friendly actually means in the context of this series, because it is very different from that.

What we changed. We changed the presentation, not the content. Short paragraphs instead of long blocks of text. Conversational sentence structures instead of formal exposition. Humour as a memory hook — children remember what they laughed at. Emotional stakes through character — children track information better when they care about who it is happening to.

What we did not change. The science. Book 1 covers osmotic pressure, gill function, and salinity gradients. Book 2 covers trophic levels, biological pest control, and the physics of archerfish water jets. Book 3 covers halocline formation, the nitrogen cycle, and the chemistry of water density. These are not simplified versions of these topics. They are the topics, presented through story.

A child who has read Book 1 and understood what happened to George in the brackish tank has learned real biology. The fact that they were laughing while they learned it does not reduce the quality of what they learned.

— Yechiel Kuperman, Marine Biologist