@aquapt Great suggestion too! Yes, he is signed up for a semester of Marine Biology in Australia, so at least he will have that.
@svlab112 Thanks so much for replying! He stayed all summer this year, and despite contacting lots of labs, only one reached out, and let him change the water filtration once a week in one of their tanks. Such a shame that he was not able to do more. I did not know about the visiting student at a different UC possibility. I will start looking into that now.