感谢巫妖张的描述翻译。
感谢弑君者伊恩的专长以及职业变体翻译。
人鱼（Merfolk）
人鱼的上半身是线条完美富有吸引力的人类身体，而下半身是巨大的长着鳍的鱼尾。他们的头发和鳞片有各种色调，但附近地区的人鱼会有相似的外观颜色。人鱼可以自由在空气中呼吸，但并不擅长在地面上移动，并且很少出现在水域以外的地方。作为一个种族，人鱼是孤立的，并且他们对陌生人很不信任，但人鱼个体，特别是外出冒险的人鱼，和他们的亲戚并不相同，甚至常常非常饶舌。人鱼更关心自然和艺术而非伦理道德的思辨，并且有一种很强的保持中立的倾向。
人鱼种族特性
+2敏捷，+2体质，+2魅力：人鱼优雅、健壮而又美丽。
中型体型：人鱼是中等体型生物，不因体型获得任何加值或者减值。
基本速度：人鱼的基本速度为5尺。他们还拥有50尺的游泳速度。
生物类型：人鱼属于类人生物，水栖子类。
两栖：人鱼是两栖生物，但是不喜欢长时间离开水。
感官：人鱼拥有昏暗视觉。
防御：人鱼拥有+2天生防御加值。
无腿：人鱼没有双腿，并且不会被摔绊。
起始语言：通用语以及水族语。拥有足够智力的人鱼可以选择下列语言作为额外语言：底栖魔鱼语（Aboleth），邪灵语，龙语，精灵语以及木族语。
种族特性替换
以下种族特性可以用来替换人鱼的种族特性。在选择这些新选项之前请先咨询您的DM。
黑暗视觉（Darkvision）：有些人鱼喜欢深海多于浅海。拥有该种族特性的人鱼获得60尺黑暗视觉以及光线敏感。该特性取代感官的昏暗视觉。
海中歌者（Seasinger）：人鱼那动听的歌声是世人皆知的。海中歌者的表演（歌唱，Perform (sing)）检定获得+2种族加值，并且所有依赖语言的法术的豁免DC获得+1种族加值。该特性取代感官的昏暗视觉。
强壮尾部（Strongtail）：少数人鱼拥有宽大、强壮的尾部，这种尾部使得她们相对于其他同族的尾部更适合在陆地上行走。拥有该种族特性的人鱼在地面上的基本速度为15尺，并且拥有30尺的游泳速度。
天赋职业奖励
下列选项适用于所有拥有列表中天赋职业的人鱼，除非另有说明，每当你获得天赋职业级别均会获得该奖励。
德鲁伊：德鲁伊的动物伙伴生命值提高1点。如果人鱼更换了她的动物伙伴，新的动物伙伴也会获得该加值。
游侠：游侠的动物伙伴生命值提高1点。如果游侠更换了她的动物伙伴，新的动物伙伴也会获得该加值。
术士：当决定带有水描述符（water descriptor）的法术的范围时，视为术士的施法者等级提高1/2级。
种族变体职业
以下种族变体职业适用于人鱼。
波涛守卫（游侠变体）
波涛守卫在大海之中巡逻，守护着人鱼社群的安全和秘密。虽然他在水下无可匹敌，但是陆地却会限制他的能力。
深水哨卫(Deep Sentinel，特异能力)：当波涛守卫在水下察觉生物时，将其等级的一半(至少+1)加在察觉检定上。这一能力取代追踪。
海威专长(Aquatic Prowess Feat，特异能力)：在2级和之后的每4级，波涛守卫可以选择一个奖励专长以强化其在水体环境中的威力。他无需满足先决条件便可选择这些专长。最初，他可以选择以下专长：闪避，灵活移动，捕网熟练(Net Adept，极限战斗)，网叉并用(Net and Trident，极限战斗)，捕网战技(Net Maneuvering，极限战斗)，精准射击，快速装填，海之猎手(译注：进阶种族指南，见下)，双武器战斗。6级时，他将以下专长加入列表：精通双武器战斗，捕网诡计(Net Trickery，极限战斗)，跳跃攻击。10级时，他将高等双武器战斗和精通精准射击加入列表。这一能力在其他方面如同标准游侠的战斗流派般作用，包括对着甲的限制，并取代战斗流派奖励专长。
偏好地形(Favored Terrain，特异能力)：3级时，波涛守卫获得水体作为偏好地形。在8级和之后的每5级，他在水体中的加值都提升+2。他不会获得额外的偏好地形。这一能力在其他方面如同标准游侠的偏好地形般作用，并取代它。
海之子(Seaborn，特异能力)：7级时，波涛守卫可以以任何速度通过任何水中植被(比如珊瑚或海藻)或潮湿表面，并且不会受到任何伤害或惩罚。但是，被魔法强化的，或使用魔法手段特意用来阻碍行动的此类地形还是会对他造成影响。这一能力取代穿林步。
水族召唤(Watery Summons，类法术能力)：8级时，每日一次，波涛守卫可以以一个整轮动作召唤盟友。这一能力如同召唤自然盟友III般运作，除了它只能召唤具有水生(aquatic)或水系(water)亚种的生物。11级时，这一能力提升至召唤自然盟友IV，并在之后的每3级都如此增强。波涛守卫的施法者等级等同于其游侠等级。这一能力取代快速追踪。
新种族规则
以下规则适用于人鱼。若经过DM的允许，可以开放部分内容给其他合适的种族。
人鱼装备
人鱼可以使用以下装备。
| 人鱼装备 |
| 远程武器 | 价格 | 重量 |
| 水下重弩 | 100gp | 8磅 |
| 水下轻弩 | 70gp | 4磅 |
水下弩弓（Underwater Crossbow）：水下弩弓的功能与地面上使用的对应版本相似，并且能够在在水下使用。当使用其在水下射击时，弩的射程增量为20尺。任何擅长弩的人都能够使用水下弩弓。
人鱼专长
人鱼可以使用以下专长。
海之猎手（战斗专长）（Sea Hunter (Combat)）
你的攻击让游泳中的对手失去平衡。
先决条件：寓守于攻，人鱼
好处：当你对一名正在游泳的目标进行了一次成功的近战攻击时，你可以以一个自由动作尝试让目标失去平衡。将这个动作视作一个摔绊战技。若你成功，目标会被视为失去平衡(参见表13-7：水下战斗调整值，核心规则手册433页)直到它重新恢复平衡(通常是在它的回合进行一个游泳检定)。这一专长对具有游泳速度的、具有自由行动或类似魔法效果的以及无法被摔绊的生物无效。
人鱼奇物
人鱼可以使用以下奇物。
海沫披肩（SEAFOAM SHAWL）
灵光：微弱变化系；施法者等级：5级
位置：肩部；价格：6000gp；重量：1磅
这件带有精致蕾丝的披肩每天可以给予穿戴者一次化鳍为趾（见人鱼法术）法术的好处。
制造条件：制造奇物，化鳍为趾
制造成本：3000gp
人鱼法术
人鱼可以使用以下法术。
化鳍为趾（FINS TO FEET）
学派：变化系（变形）
等级：德鲁伊 3，术士/法师 3，女巫 3
施法时间：标准动作
成分：语言，姿势
范围：接触
目标：接触到的自愿生物
持续时间：1小时/等级（可解消）
豁免：无
法术抗力：可
你将目标的鱼鳍、脚蹼或者尾巴转化为腿部与脚部，使其能够在陆地上行走。目标失去他的游泳速度，但是获得相当于他体型的类人生物的基本速度（中型或大型获得30尺速度，小型获得20尺）。如果该生物浸泡在水中1轮，变化的效果就会恢复，并允许其正常游泳。而当他离开水1轮之后，变化会再度发生，使其能够行走。
该法术只对人鱼、梭螺鱼人（tritons）、半人鱼（seals）、鱼类（fish）以及其他身体或肢体适于游泳但是不适于行走的生物有效。但是该法术不会给予目标在空气中呼吸的能力。
原文
Merfolk
Merfolk have the upper torsos of well-built and attractive humans and lower halves consisting of the tail and fins of a great fish. Their hair and scales span a wide range of hues, with merfolk in a given region closely resembling each other. Merfolk can breathe air freely but move on dry land only with difficulty, and rarely spend long periods out of water. As a race, merfolk are insular and distrustful of strangers, but individuals, especially adventuring merfolk, break the mold and can be quite garrulous.Merfolk concern themselves more with nature and the arts than with morality and ethical debates, and have a strong inclination toward neutral alignments.
Merfolk Racial Traits
+2 Dexterity, +2 Constitution, +2 Charisma: Merfolk are graceful, hale,and beautiful.
Medium: Merfolk are Medium creatures and have no bonuses or penalties due to their size.
Slow Speed: Merfolk have a base speed of 5 feet. They have a swim speed of 50 feet.
Aquatic: Merfolk are humanoids with the aquatic subtype.
Amphibious: Merfolk are amphibious, but prefer not to spend long periods out of the water.
Low-Light Vision: Merfolk have low-light vision.
Armor: Merfolk have a +2 natural armor bonus.
Legless: Merfolk have no legs, and cannot be tripped.
Languages: Merfolk begin play speaking Common and Aquan. Merfolk with high Intelligence scores can choose from the following: Aboleth, Aklo, Draconic, Elven, and Sylvan.
ALTERNATE RACIAL TRAITS
The following racial traits may be selected instead of existing merfolk racial traits. Consult your GM before selecting any of these new options.
Darkvision: Some merfolk favor the lightless depths over shallower waters. Merfolk with this racial trait gain darkvision with a range of 60 feet and light sensitivity. This racial trait replaces low-light vision.
Seasinger: The beautiful voices of the merfolk are legendary. A seasinger gains a +2 racial bonus on Perform (sing) checks and a +1 racial bonus to the save DC of language dependent spells. This racial trait replaces low-light vision.
Strongtail: A few merfolk have broad, strong tails that are more suited for land travel than the typical merfolk tail. Merfolk with this racial trait have a land speed of 15 feet and a swim speed of 30 feet.
FAVORED CLASS OPTIONS
The following options are available to all merfolk who have the listed favored class, and unless otherwise stated, the bonus applies each time you select the favored class reward.
Druid: Add +1 hit point to the druid’s animal companion.If the merfolk ever replaces her animal companion, the new animal companion gains these bonus hit points.
Ranger: Add +1 hit point to the ranger’s animal companion.If the ranger ever replaces his animal companion, the new animal companion gains these bonus hit points.
Sorcerer: Add +1/2 to the sorcerer’s caster level when determining the range of any spells with the water descriptor.
RACIAL ARCHETYPES
The following racial archetype is available to merfolk.
Wave Warden (Ranger)
The wave warden patrols beneath the sea, preserving the safety and secrets of merfolk communities. Though he fares best beneath the water, dry land is no haven to his quarry.
Deep Sentinel (Ex): A wave warden adds half his level (minimum +1) on Perception checks made to notice creatures underwater. This ability replaces track.
Aquatic Prowess Feat (Ex): At 2nd level and every four levels thereafter, a wave warden selects a bonus feat that improves his prowess in aquatic environments. He can choose these feats even if he does not meet the prerequisites. Initially, he may choose from the following feats: Dodge, Mobility, Net Adept (Ultimate Combat), Net and Trident (Ultimate Combat),Net Maneuvering (Ultimate Combat), Precise Shot, Rapid Reload, Sea Hunter, and Two-Weapon Fighting. At 6th level, he adds Improved Two-Weapon Fighting, Net Trickery (Ultimate Combat), and Spring Attack to the list. At 10th level, he adds Greater Two-Weapon Fighting and Improved Precise Shot to the list. This ability otherwise functions like and replaces the standard ranger’s combat style bonus feats,including the limitations on armor worn.
Favored Terrain (Ex): At 3rd level, a wave warden gains water as a favored terrain. At 8th level and every five levels thereafter, his bonus in aquatic terrain increases by +2. He does not gain additional favored terrains. This otherwise functions like the standard ranger’s favored terrain ability and replaces that ability.
Seaborn (Ex): At 7th level, a wave warden may move through any sort of aquatic growth (such as coral or seaweed) or across a wet surface at his normal speed and without taking damage or suffering any other impairment. Obstacles that are enchanted or magically manipulated to impede motion still affect him. This ability replaces woodland stride.
Watery Summons (Sp): At 8th level, a wave warden can summon allies once per day as a full-round action. This functions as summon nature’s ally III, except it can only be used to summon creatures with the aquatic or water subtypes. At 11th level, this ability improves to summon nature’s ally IV, with this progression continuing every three levels thereafter. The warden’s caster level is equal to his ranger level. This ability replaces swift tracker.
NEW RACIAL RULES
The following options are available to merfolk. At the GM’s discretion, other appropriate races may also make use of some of these.
Merfolk Equipment
Merfolk have access to the following equipment.
Underwater Crossbow: An underwater crossbow functions like its normal counterpart above water, and can be used underwater. When fired underwater, the crossbow has a range increment of 20 feet. Anyone proficient with a normal crossbow can use an underwater crossbow.
Merfolk Equipment
Ranged Weapons Cost Weight
Underwater crossbow, heavy 100 gp 8 lbs.
Underwater crossbow, light 70 gp 4 lbs.
Merfolk Feats
Merfolk have access to the following feat.
Sea Hunter (Combat)
Your blows knock swimming opponents off balance.
Prerequisites: Combat Expertise, merfolk.
Benefit: When you make a successful melee attack against a swimming target, as a free action you can attempt to knock the target off balance. Treat this as a trip combat maneuver. If you succeed, the target is considered off balance (see Table 13–7: Combat Adjustments Underwater on page 433 of the Core Rulebook) until it recovers its balance, usually by making a Swim check on its turn. This feat has no effect on creatures with a swim speed, those using magic such as freedom of movement, and creatures that can’t be tripped.
Merfolk Magic Items
Merfolk have access to the following magic item.
SEAFOAM SHAWL
Aura faint transmutation; CL 5th
Slot shoulders; Price 6,000 gp; Weight 1 lb.
DESCRIPTION
This shawl of delicate lace grants the benefits of the fins to feet spell (see below) once per day.
CONSTRUCTION
Requirements Craft Wondrous Item, fins to feet; Cost 3,000 gp
Merfolk Spells
Merfolk have access to the following spell.
FINS TO FEET
School transmutation (polymorph); Level druid 3, sorcerer/wizard 3, witch 3
Casting Time 1 standard action
Components V, S
Range touch
Target willing creature touched
Duration 1 hour/level (D)
Save none;
Spell Resistance yes
You transform the target’s fins, flippers, or tail into legs and feet, allowing it to walk on land. The target loses its swim speed but gains a base speed appropriate for a humanoid of its size (speed 30 if a Medium or larger creature, speed 20 if Small). If the creature is immersed in water for 1 round, the transformation reverts, allowing it to swim normally. One round after leaving the water, the transformation occurs again, allowing it to walk.
This spell only works on merfolk, tritons, seals, fish, and other creatures whose bodies or limbs are used mainly for swimming and are not suitable for walking. It does not give the target the ability to breathe air.