And not alike are the two bodies of water. One is fresh (35:12)

﴿وَمَا يَسْتَوِي الْبَحْرَانِ هَٰذَا عَذْبٌ فُرَاتٌ سَائِغٌ شَرَابُهُ وَهَٰذَا مِلْحٌ أُجَاجٌ ۖ وَمِن كُلٍّ تَأْكُلُونَ لَحْمًا طَرِيًّا وَتَسْتَخْرِجُونَ حِلْيَةً تَلْبَسُونَهَا ۖ وَتَرَى الْفُلْكَ فِيهِ مَوَاخِرَ لِتَبْتَغُوا مِن فَضْلِهِ وَلَعَلَّكُمْ تَشْكُرُونَ﴾
[ فاطر: 12]

35:12 And not alike are the two bodies of water. One is fresh and sweet, palatable for drinking, and one is salty and bitter. And from each you eat tender meat and extract ornaments which you wear, and you see the ships plowing through [them] that you might seek of His bounty; and perhaps you will be grateful.

And the two seas are not alike: One of them is extremely sweet and easy to drink due to its sweetness, and the other is salty and bitter which is not drinkable due to its extreme saltiness.
And from each of the abovementioned seas you eat fresh meat, which is fish, and you extract from them rubies and coral which you wear as adornment.
And you see the ships, O onlooker, splitting the sea with its sailing, coming and going, so you can seek the grace of Allah through trade, and so that you thank Allah for His many favours He has done for you.

And the two seas (kinds of water) are not alike, this fresh sweet, and pleasant to drink, and that saltish and bitter. And from them both you eat fresh tender meat (fish), and derive the ornaments that you wear. And you see the ships cleaving (the seawater as they sail through it), that you may seek of His Bounty, and that you may give thanks.

phonetic Transliteration

Wama yastawee albahrani hatha AAathbun furatun saighun sharabuhu wahatha milhun ojajun wamin kullin takuloona lahman tariyyan watastakhrijoona hilyatan talbasoonaha watara alfulka feehi mawakhira litabtaghoo min fadlihi walaAAallakum tashkuroona

Abdullah Yusuf Ali - Translation

Nor are the two bodies of flowing water alike,- the one palatable, sweet, and pleasant to drink, and the other, salt and bitter. Yet from each (kind of water) do ye eat flesh fresh and tender, and ye extract ornaments to wear; and thou seest the ships therein that plough the waves, that ye may seek (thus) of the Bounty of Allah that ye may be grateful.

Safi-ur-Rahman al-Mubarakpuri

And the two seas (kinds of water) are not alike: this is palatable, sweet and pleasant to drink, and that is salty and bitter. And from them both you eat fresh tender meat (fish), and derive the ornaments that you wear. And you see the ships cleaving, that you may seek of His bounty, and that you may give thanks.

Page 436 English transliteration