So this is Neptune whom is known as a Lir
I created the species because of my need to be unique.

The word Lir is based off the Irish folklore of the God of the Sea. A creature of the waters but just as swift on land. A mammal that lives in land and sea. It has most of its diet as meat and fish and can swim up to 50ft under water with a single breath. It's water colored fur hides them from other creatures by blending in with the oceans blue and green hues. Their eyes are dulled out and weak, able to adjust under dark depths and night hues, but being Mostly blind in daylight. Their nocturnal. Due to poor sight they use vibrations to see. Sonar.

Large feet paws keeping them to kick over boulders and thicker items to get to their meals. Males grow large antlers to fend off sharks and other predators while females have slightly smaller sets to attract their mates. Their fur is double coated and keeps out the cold but clenched tight like a suit when in the water depths. The Web between their fingers, toes and sides help guide the creature through the waters while their large saber like fangs are meant to break through shells and other closed items in the depths to gain more food

Though they are partially blind during the lighting of days, Their eyes can see excellent in the Night and darkness of the pits of the seas. The Salt water of the sea also helps them sea under the water as if it was crystal clear. (( this is only for the art of Lir's who come from the sea )) Their large ears work like whiskers on a otters face, feeling the sea's vibrations to find the nearest source of food. Their tail's also help on the surface to create noises and vibrations for the Lir to outline the world so they could see, making them creatures who constantly are moving in some sort of way so they would not be blind like a bat.

Their mane is not only for good looks but as it rolls down the back it turns into a fur covered fin that helps break the surface of the waters and balance their bodies in the waters while swimming. The webs under their arms help navigate their bodies as well in the waters. The back tuff of fur that connects to their mane is indeed a soft but strong fin, similar to a dolphin or shark. It does not go down. It stays up like a fin.

I'm still working on details for the creature but yeah. It's my baby and I'm proud of it.