This is a sculpin fish. Interesting looking fish. This is a little info I found about them on the internet:

Related to scorpionfish, sculpins have spines that are mildly venomous. However, the venom would affect a person no more than a mosquito bite, with localized swelling and mild itching. A person stung by a sculpin would be more at risk for infection than invenomation.
Luckily, Bo didn't get stuck!