Well I tried to do that and them unfortunately the shrimp died when winter came along. They were next to a window. I think I only have about two weeks anyway..
Ah! You have learned more than most have already.
When it comes to experiments, a back up plan is critical.
Discuss this no matter what(if you had the option to redo the test etc).
We learn from making mistakes. And along the way, we makes lots of them.
Just try not to repeat them.
You might mention this, then see if you can find some data on shrimp that will support some hypothesis on color, then say "well I tried but....... Since I ran out of time, I used this data set". Not sure if that is okay or not with those grading. But it's certainly happened many times before to students.
A simple fish test that's fast: mating attempts with guppies.
Males with flashing colors vs plain old non colored males.
Another is O2 production in CO2 enriched water vs non enriched, you use a test tube to catch the O2 from Egeria densa etc.
You can also test the yeast fermentation tolerances by catching the CO2 produced inside test tubes and measuring the volume with various Yeast/water/sugar treatments.
Say you want to know what effect temperature has on yeast at say 20C, 30C, 40C and 50C(stick heaters can provide the different temps).
Then plot a graph of CO2 produced vs time for each temp.
Then postulate why you get a maximum at 30-40C and then less at 20C and 50C etc.
All these can be done in 1-2 days. The write up etc, may take a week etc.
Ask for help. Folks can help you.