Aboleth

Alien Presence (Ex)

At 3rd level, your aberrant taint becomes more obvious. You gain a +2 inherent bonus to Intimidate skill checks. Animals will not attack you unless they succeed on a Will save (DC 10 + half your level + your Charisma modifier). At 11th level, your bonus to Intimidate checks increases to +4 and to +6 at 17th level.

Malignant Intelligence (Ex)

At 9th level, you gain a +2 inherent bonus to your Intelligence, and you add your Intelligence modifier to all Intimidate skill checks.

Your bonus to Intelligence increases to +4 at 13th level and to +6 at 17th level.

Tentacles (Su)

At 15th level, you can deploy up to four otherwise hidden tentacles with a reach of 15 ft. Each tentacle can make a melee touch attack that deals 1d6 hp acid damage/sorcerer level but does not otherwise increase your threatened area. Attacking with more than one tentacle in a round is a full-attack action. You may use these tentacles for a number of rounds per day equal to your Charisma modifier.

These rounds need not be consecutive.

Skum Lord (Ex)

At 20th level, your aberrant heritage is plain to everyone; your eyes grow larger, your gills are visible, and so forth. You can breathe underwater, and you gain blindsight 60 ft. Your strange anatomy grants you DR 5/— and a 25% chance critical hits and sneak attacks fail against you. Any foe you demoralize in combat is frightened instead of shaken.