Traits

A strange and unique jaw trait where instead of a standard tongue, the leech develops a sensory organ with a functional face. 

This tongue is typically anchored to the floor of the mouth, but there have been some leeches observed to have it originating from farther down the throat. 
Leeches with a meatstraw can use it to make a distinctive 'fweep!' noise, and in many cases it can function as a second head with the ability to bite, taste, eat, and in some legendary cases, talk and hold a weapon.  Meatstraw leeches often exhibit a higher intelligence as the little faces are very expressive, and are used to communicate their feelings with their owners in a variety of creative ways.

Note: It may be accompanied by any type of teeth.
Minor traits may be applied to the meatstraw itself, such as ears or feelers, so long as they do not obstruct the mouth.

Trade Secret: An extra long tongue may be achieved exclusively by combining the Meatstraw trait with a Magical Eclair item!

 A mythical trait where the standard leech mouth is split into quadrants, each lined with sharp teeth, and is named for being reminiscent of carnivorous plants. 

This is the only mouth type trait where a leech has small individually-set teeth instead of plates, and as such, cannot be combined with other types.
On occasion, a leech with this trait may have only the upper or lower jaw split, rather than both, resulting in three sections instead of four. 

Leeches exhibiting this trait can easily fit the four segments of their mouth around a hare or turkey, and just as easily snap them shut around a human head, taking it clean off a body.  It is considered a dangerous trait to work with if the leech has an unpleasant temperament, though this hasn't stopped breeders from trying to incorporate it into vibrant plant themed show-creatures with varying degrees of success.

Angular folds centered around the jaw muscles that allow the mouth to be opened to a truly fearsome width.

Often used to create a backdraft that essentially sucks smaller creatures in, such as bats, leeches with Gulper jaw have been seen partially enveloping larger targets headfirst, setting their teeth into the neck flesh, and rolling like a crocodile to quickly shred and dispatch prey.

A solid, smooth, regular neck with even fat deposits.

A leech's neck needs to be thick and elastic in order to swallow down large morsels of prey.  This particular model is the standard for the species, and all other neck traits have adapted from it.

A thick layer of padding has developed all the way around the leech's neck and used to store blood or fat. 

These leeches are big eaters but can go long times between meals which makes them a favorite pick as mounts for adventurers.  They tend to puff up even more after the leech has fed for a sometimes comical effect.

Fat and storage space have bunched up towards the top of the head to create a rolly, cushioned look similar to a thick hood. 

In the wild this gave a leech extra bulk to help it look intimidating, but owners of pet and mount leeches find it's a great trait for thick necked leeches who still need to be fitted with a collar or harness!

Built in a similar way to a camel, but as a large fat cushion on the back of the neck.

It gives the appearance of a hunch, even if the leech's neck itself is usually straight. Sometimes overfed leeches may find themselves weighed down by it.
It's not uncommon to see these leeches draped with bright fabrics and trinkets as the added space makes a great canvas for decoration.  It also makes a comfortable head rest for sleepy riders who need to go long distances.

Excess skin has developed and wrinkled at the base of the leech's throat to create this trait. 

Similar to the others, they fill out into a puffy flesh collar when the leech has consumed blood, often blending entirely into the rest of the neck and shoulders in cases when the leech has glutted itself.

The leech has developed a thick sac at the front of the neck that can be filled with air or fluid and used to make noise. 

Croak sacs are sometimes harvested and turned into satchels and bags, as the superstitious believe that the items stored inside them will never get lost.

Thick folds on either side of the neck that hang down into a loose hood shape. When the leech is full, they become dense, flaring out like a cobra.

Popular among collectors and as desert mounts, the cobra neck is often owned by an exquisitely patterned leech.  They are considered a symbol of prosperity in certain circles.
If the leech overfeeds, however, it looks extremely undignified; appearance-focused owners will do their utmost to ensure a balanced diet with no extra snacks.

Sometimes your cheeks just aren't big enough for all the blood you want to save for later.

A mythical trait where a leech grows a layer of fur over its neck to give it the appearance of having a fluffy collar. 

In most occasions the neck is the only place this fur will grow, but there are recorded incidents of furred leeches displaying this trait in the form of a noticeably thicker, extravagant collar or mane.

Sometimes pores in a leech's neck will develop a transparent skin over them, expanding and fleshing out into pockets for storage. 

Leeches featuring this trait will use them to show and display things that they're fond of collecting, whether it be physical objects, blood, or other foods. They tend to have much bulkier necks as well, both to have space for the neck cavities and strength to hold things stored inside.
It's extremely popular with luxuries and pets to have this combined with blush cheeks.

A rare mutation in which a leech sports a large frill of skin around its neck.

In the wild leeches use this frill to intimidate attackers, but they can also use it to express their emotions. A frill neck can just be plainly colored, but they often sport eye-like designs to add to the intimidation effect. 

Note: The frill can usually be raised and lowered at will, but can permanently be either or; and positioned anywhere on the neck itself.

[Potion item]: Magic Eclair

A neck that is extended up to one and a half times as long as the leech's own body. 

Leeches with this neck tend to be slender and notably more delicate. Because the length is so unstable, they often have to lie down when feeding to reduce risk of injury.
Necks that are twice as long as the body will almost always result in fatality due to blood being unable to reach the brain, and breeders frequently question how humane the trait is at all. 

A basic tail edged with a layer of thin skin.

Most common on water dwelling leeches, this tail is usually seen in earlier tadpole stages. However, some leeches retain it for swimming even as they grow into adulthood. 

A thick strong tail with no unique features. 

The original flavor leech tail! It works great at either storing fat or paddling through the water.

A short nub tail.

Its biological usefulness as a tail is questionable, so leeches with this trait usually have a fatter neck to make up for it.
However, its diminutive size makes it ideal for low-maintenance ranch or working leeches. 

A large short tail, shaped like an orb.

Very common on pets and livestock leeches.