Shade
Monster Junkie
Yep, one too many Wester Bacon Thickburgers. 
A shark has blindsense, so why not. However, if it is eyeless, go with blindsight (blindsense is too weak for sole method of vision). Also, why not borrow from the shark:
Keen Scent (Ex): A shark can notice creatures by scent in a 180-foot radius and detect blood in the water at ranges of up to a mile.
Progeny Suggested Skill Ranks: Escape Artist 5, Move Silently 1
Progeny Suggested Feats: Stealthy, Weapon Finesse
Apodalypse Suggested Skill Ranks: Listen 8, Spot 8 (it doesn't really need anything else, does it?)
Apodalypse Suggested Feats: Great Fortitude, Improved Initiative, Iron Will, Power Attack (all but Multiattack and Power Attack borrowed from shark)
Also, should these critters have the amphibious quality (particularly the progeny)?

A shark has blindsense, so why not. However, if it is eyeless, go with blindsight (blindsense is too weak for sole method of vision). Also, why not borrow from the shark:
Keen Scent (Ex): A shark can notice creatures by scent in a 180-foot radius and detect blood in the water at ranges of up to a mile.
Progeny Suggested Skill Ranks: Escape Artist 5, Move Silently 1
Progeny Suggested Feats: Stealthy, Weapon Finesse
Apodalypse Suggested Skill Ranks: Listen 8, Spot 8 (it doesn't really need anything else, does it?)
Apodalypse Suggested Feats: Great Fortitude, Improved Initiative, Iron Will, Power Attack (all but Multiattack and Power Attack borrowed from shark)
Also, should these critters have the amphibious quality (particularly the progeny)?