Hi! I'm also looking at studying Marine Biology (potentially with Oceanography) this coming year so maybe I can help by telling you some of what I saw and got told.
So most of the earth and ocean sciences was displayed in the Central Teaching Hub (I'm sure this was the name), and the room with the labs was huge! Definitely super sciency. The teachers and students were all super welcoming which I personally found great. The course is apparently super customisable, so two students on the same course can go on completely different pathways.
I had no idea but apparently they do day trips down to other places such as Wales, Plymouth and Scotland! They get to use boats from Plymouth's research facility, or something along the lines which I found super fascinating.
One thing that I didn't know is that if you're looking to study things like plankton within the ocean you'd do good looking at Marine Biology with Oceanography - I had no idea about this so I made sure to apply for both Marine Bio and Marine Bio + Oceanography.
The vibe was great and the building and facilities were pretty impressive to me, so safe to say Liverpool is going to be my first choice right now.
Hopefully some of this helps you! Though I'll still recommend that you find a way to speak to someone on the course and not just another prospective student.