This long-tailed aquatic beast resembles a massive snapping turtle with draconic features.
AC 23, touch 8, flat-footed 23 (+15 natural, –2 size)
Speed 20 ft., swim 30 ft.
Str 27, Dex 10, Con 19, Int 12, Wis 13, Cha 12
Cloud of steam 20 feet high, 25 feet wide, and 50 feet long, once every 1d4 rounds, damage 12d6 fire, Reflex DC 20 half; effective both on the surface and underwater. The save DC is Constitution-based.
A dragon turtle can attempt to capsize a boat or ship by ramming it as a charge attack and making a CMB check. The DC of this check is 25, or the result of the boat captain's Profession (sailor) check, whichever is higher. For each size category larger than the dragon turtle's size, it takes a cumulative –10 penalty on this CMB check.