Megaquarium has evolved with the latest big free update for this aquarium building sim, along with a fun sounding new DLC expansion out now.
The new DLC called Megaquarium: Invertebrilliant Collection adds in a whole lot of content for the Sandbox Mode including: 15 tropical marine invertebrate species, new backdrops and centrepieces, new types of tanks, new plants, new accessories, new facilities and more. There was already quite a lot in the game - and with this there's just a whole lot more to build with!
You can see a new trailer for it below:

Direct Link
The free update for everyone included some nice stuff too including an improved search system, a better message log with filtering, an advanced priorities system for staff, lights can now be placed on any tank, a polished up campaign - they said the original campaign is much the same just "better" and there's two new achievements to hunt as well.
Great game and it has an Overwhelmingly Positive review score on Steam.
Quoting: CaldathrasThis looks like it could be fun, especially if it sticks to real species instead of made-up ones.It has admittedly been a while since I last played, but I'm fairly sure Megaquarium uses all real species.




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