An image of a man is his primary Emblem while wavy lines or bars representing water his second.
Reuben, thou art my firstborn, my might, and the beginning of my strength, the excellency of dignity, and the excellency of power:
Unstable as water, thou shalt not excel; because thou wentest up to thy father's bed; then defiledst thou it: he went up to my couch.

A bull, horn or Unicorn are his Emblems.

Remember this Abrahamic Covenant: His seed is to become a Company of Nations.
Joseph is a fruitful bough, even a fruitful bough by a well; whose branches run over the wall:
The archers have sorely grieved him, and shot at him, and hated him:
But his bow abode in strength, and the arms of his hands were made strong by the hands of the mighty God of Jacob.
And for the precious things of the earth and fullness thereof, and for the good will of him that dwelt in the bush: let the blessing come upon the head of Joseph, and upon the top of the head of him that was separated from his brethren and Moses said: His glory is like the firstling of his bullock, and his horns are like the horns of unicorns: with them he shall push the people together to the ends of the earth: and they are the ten thousands of Ephraim, and they are the thousands of Manasseh.

A sailing vessel is used to depict this tribe's Emblem.
Zebullun shall dwell at the haven of the sea; and he shall be for an haven of ships; and his border shall be unto Zidon.

NOTE: Because the tribe was land locked in ancient Israel this is a prophecy for a later time.

A covered cup or goblet appear on his Emblem.
Out of Asher his bread shall be fat, and he shall yield royal dainties.

An olive branch and/or a bundle of arrows are found in this Emblem.

Remember this Abrahamic Covenant: His seed is to become a great Nation.
Joseph is a fruitful bough, even a fruitful bough by a well; whose branches run over the wall:
The archers have sorely grieved him, and shot at him, and hated him:
But his bow abode in strength, and the arms of his hands were made strong by the hands of the mighty God of Jacob.

And for the precious things of the earth and fullness thereof, and for the good will of him that dwelt in the bush: let the blessing come upon the head of Joseph, and upon
the top of the head of him that was separated from his brethren. His glory is like the firstling of his bullock, and his horns are like the horns of unicorns: with them he shall push the people together to the ends of the earth: and they are the ten thousands of Ephraim, and they are the thousands of Manasseh.

A serpent or a startled steed as well as an eagle adorn his Emblem.
Dan shall judge his people, as one of the tribes of Israel.
Dan shall be a serpent by the way, an adder in the path, that biteth the horse heels, so that his rider shall fall backward.

Dan is the only tribe not represented in the 144,000 first fruits mentioned in Revelations. 

Originally a doe and replaced later by a stag are attributed to his Emblem.
Naphtali is a hind let loose: he giveth goodly words.

 His Emblem is a sword for obvious reasons with a gate or walled city his second.
Simeon and Levi are brethren; instruments of cruelty are in their habitations.
O my soul, come not thou into their secret; unto their assembly, mine honour, be not thou united: for in their anger they slew a man, and in their selfwill they digged down a wall.
Cursed be their anger, for it was fierce; and their wrath, for it was cruel: I will divide them in Jacob, and scatter them in Israel.

A burrow with a pack is on his Emblem.
Issachar is a strong ass couching down between two burdens.

A warrior with a pendant recalling a leader of a troop is his Emblem.
Gad, a troop shall overcome him: but he shall overcome at the last.