I have a tiger tail cucumber in my 75 gallon. I went to feed the coral/fish today and noticed he was completely vertical on the front corner of my aquarium. About 20 minutes later, I noticed he moved to the back corner. About 3 hours later, he is still hanging on the glass. I've had him for about 9-10 months and he is about 14" or so long when stretched out.
I've seen him before on the glass at night, but it is unusual for him to roaming with the lights on. Of course, I'm worried that he is gonna get sucked into a powerhead or might be dying. I'd rather sacrifice him then risk him taking out my aquarium.
Clean up crew
-1 turbo snail
-Dozen or so hermits
-3 nassarius snails.
-4 bumble bee snails
-1 larger cleaner shrimp
-6 astraea snails
I have a two spot goby which is probably another competitor for his food. I did notice a dead nassarius snail a few days ago.
pH: 8.4-85
temp: 76-7.3
Alk: 10.8
Cal: 390
Is this normal behavior or should I begin to worry? Thanks for your help.