I put it in the microwave for 5 minutes to soften it and all the tortoises love it. So yep, yours can eat it. He will love it. The outside is hard tho so you'll have to scrape out the inside, the spaghetti part...
Squash and pumpkin are great sources of lots of good nutrients, although they often take a little 'softening up' as Maggie said.
Even though they are usually called vegetables, they are technically fruits since they contain seeds- but since they are not the rather wet and sweet things we call 'fruits', they are usually safe to use at least occasionally for most tortoise species- even those that do not do well with more sugary items.
Thanks. He gets mostly greens cactus and grass. I only give him tomatoes squash and carrots every once in awhile. I just wasn't sure about spaghetti squash