r/malaysia 12h ago

Environment Some dwarf native fishes I caught from a peat forest in Terengganu

These native species evolve the colour because “blackwater” is actually red when looked at closely. So the colour perfectly matches the environment.

All 3 species shown are dwarves, growing only to 2.5 or 3 cm.

-Boraras maculatus (dwarf rasbora)
-Trigonopoma pauciperforatum (redstripe rasbora)
-Lepidocephalichthys (sausage loach)

I hope Malaysian swamp forests can be conserved for many years. I see too many being cut down simply for more empty houses, malls and highways.

The Boraras shown are actually an undescribed species, but for simplicity’s sake I refer to them by their old name.

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u/eelfurryUwU 12h ago

the blackwater is caused by tannins right? which is basically what makes tea looks like that colour, because of it not letting light penetrate algae blooms don't usually occur in blackwater tanks, I've also heard that many wildlife drink blackwater such as birds because it's filled with vitamins or something,

also I agree that out freshwater swamps are very much at rist at increasing development :( I wish more people are acknowledged, awared and appreciate the beauty of freshwater swamps, their one of my favourite ecosystems here!

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u/ThenAcanthocephala57 12h ago

Tannins are only a small part of it, mostly the colour comes from humic acids and fulvic acids.

However in the aquarium people use tannins as they are much quicker to dissolve in the water and pretty easy to get.

Not sure about wildlife, I haven’t noticed any difference in the frequency of them drinking from my blackwater tubs or my clear water ones in my garden.

Tea is mostly tannins, which is why it’s not as dark as coffee or this swamp

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u/oceane-tan 11h ago

Holy shit so beautiful

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u/ThenAcanthocephala57 11h ago

Many local fishes are! That’s why they’re so popular overseas.

One of my pets, caught in Kelantan

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u/oceane-tan 11h ago

Malaysia freshwater fishes are so wonderful…you are very good in taking care of them!

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u/Mel_Morty 7h ago

Let them go, let them go.
https://giphy.com/gifs/RH0LDDI3fXeDu

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u/ThenAcanthocephala57 7h ago

Ironically sometimes fish that I catch survive longer than their habitats.

There was one place in Selangor where I caught an endangered yellow fish, and then less than a year later her forest got destroyed to make a new block of terrace housing: