I needed to move my Sinipercas into the front tank because they are getting bigger. So I was successful catching the first 3, but the fourth one hid between the filter and the glass. SO, bravely, I poke my finger in there to coax the fish to come out. HOLY PUTZ!, the spine got me. OMG, I think it's poisonous, because now my finger is swelling and hurts like a *****!!!