Not sure if this card will be good but it has some potential. I think it's better than Sableye bc water is def better supported than dark. We have frosmoth, Melony, froslass and capture energy is usable.
Also, Sableye with 4 damage counters does 250 + 40 = 290. Crab does 90 + 60x4 + 40 = 350...