I found a way to make watery colour bass sounds by using a very simple method. It's so simple that I'm sure you can remake it quickly.
Even though it is no way near Sharks' sound design, I hope it can give you some inspiration!
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Soundcloud: https://soundcloud.com/sharkstunes
▶▶Here's the link to the samples and serum presets:
http://bit.ly/3gdNdLL
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But I do appreciate your support and kind words a lot! And I will definitely try to make higher quality contents in the future!
▶▶You are welcome to check out my stupid music!
https://on.soundcloud.com/7UEpP
Time stamps:
0:00 Several results that you could get from this method
0:15 Make a sine pluck in Serum
0:52 Generate randomized notes in the Piano Roll
1:42 Add some effects to make the notes less plucky
3:31 Change some notes in the Piano Roll according to your preference
4:26 Resample to add more effects and make further adjustments
5:27 Add more effects to make it sound more watery
6:36 Resample to use it in your project
6:54 Final result
7:00 Use arps instead of randomized notes
7:07 Use arpeggiator to randomize notes