Ichthian - fishy/fishlike. Mmm. Fish. Tartar Sauce.
Here's the subtypes/bane types I use in my campaigns for humanoids.
Avian Subtype: These creatures are bird-like humanoids, such as aarakockra and tengu. They always have fly speeds and usually have good maneuverability. They typically speak sylvan and are feathered.
Bestial Subtype: These creatures are animalistic humanoids, such as gnolls, minotaurs, nezumi, and vanara. They typically have natural attacks, such as claws or a bite, and are usually furred. Other than that, they have little in common.
Dwarf Subtype: These are the varieties of dwarf, such as Aleithian, Deep, and Korobokuru. They typically have high Constitution scores, stonecunning, and darkvision. They all speak Dwarven.
Elf Subtype: These are the varieties of elf, such as aquatic, high, and wild. They typically have high Dexterity scores, the ability to detect secret doors, and low light vision. They all speak Elven.
Gith Subtype: These are the gith races, including gith pirates, githyanki, and githzerai. They typically have high Intelligence scores, and live on the Transitive or Outer Planes. They all speak Gith.
Gnome Subtype: These are the varieties of gnome, such as Deep, Forest, and Rock. They typically have high Constitution scores, an inherent knack for illusions, and darkvision. They all speak Gnome and are Small.
Goblinoid Subtype: Goblinoids are stealthy humanoids who usually live by hunting and raiding and who all speak Goblin. Their ranks include the goblins, hobgoblins, and bugbears.
Halfling Subtype: These are the varieties of halfling, such as Rivershore and Tallfellow. They are Small, typically have high Dexterity scores, and excellent aim. They speak any number of human regional languages.
Human Subtype: These are the humans, whatever plane they come from. They typically have no unusual ability scores, but are fast learners and gain bonus feats and skill points. They speak any number of human regional languages.
Ichthian Subtype: These creatures always have the Aquatic subtype and many are Amphibious. Examples include Locathah, Kuo-Toa, and Sahuagin, and they speak Aquan.
Orc Subtype: These are the varieties of orc, such as Mountain and Uruk-hai. They typically have high Strength scores, low Charisma scores, and darkvision. They all speak Orcish.
Ranid Subtype: These are the bullywugs, sivs, and other amphibian humanoids. They typically have the Aquatic and Amphibious subtypes, and have a racial bonus to Jump checks. They usually speak Aquan or Sylvan.
Reptilian Subtype: These are the varieties of reptilian humanoids, such as kobolds and pterrans. They typically have darkvision, but other than that vary as widely as the bestial subtype.
I like the definition of Monstrous Humanoid as "partially humanoid, but with additional limbs or heads, or lacking limbs" So centaurs, wemics, nagas, and the Kreen races fall in that category. It's a role-playing distinction more than anything: Humanoids are "PC" races, monstrous humanoids are NPC races, monstrous humanoids have to pay extra for their armor/barding, etc. Anything else falls under savage species rules.
