Dagron creatures are usually fluffy, serpent-like fellas with dragon-like front feet.
-no, they don't breath fire, but depending on the subspecies they can be resistant to fire, ice or accids-
Water dagrons are mostly ice or accid resistant subspecies, they like reefs and places close to land, with both shallow and deep water (semi aquatic ones can be often found sunning on coastal rocks or sleeping in shallow waters holdin onto boulders and fully aquatic ones can be often seen near coastal reefs, and when they sleep they're holding onto the reef rocks), depending on their environment they can rarely have fire resistence instead.
These dagrons are easiest ones to make friends with, but they're also pretty independent so even tho they are very friendly, they can be gone the next day without warning, especially when they get bored (they're the "easy come, easy gone" kind of creatures, but they can be loyal). They're very playfull and very curious, so they'll be investigating every new thing they spot and won't stay long on the same place, because they'll get bored and they like adventures, finding and investigating new places. They don't really care if they are by themselves or in bigger groups, they're pretty much fine both ways.
Water subspecies are usually scaly and don't have fluff (except for the tail fluff and "mane", but those can be missing too), they do have fur and occassionally feathers, but the fur is like the fur on seals and other water mammals or feathers are like penguin and other water bird's feathers. They can also have horns and other features. The fully aquatic dagrons usually have fins and gills and the semi-aquatic ones can hold breath for very long time, some over 2-3 hours long.
Other general information about dagrons here