There were tons of these guys out and about
Looks like one of the many species of Blister Beetles...some will bleed a chemical called "cantharidin, an odorless terpene (exo-1,2-cis
-dimethyl-3,6-ep- oxyhexahydro-phthalic anhydride) occurring elsewhere only in beetles of the family Oedemeridae
" from the joints on the legs when threatened. Quite fascinating!
But can cause this...if one is not careful with their species handling!!
Not my neck...Nice fish BTW!!