You have to advance through the hallway, but if you're a lazy ass and sit in one place Spooky will use her spatial manip and reality warping to move you along nicely.
For the specimens:
Specimen 1: Is 9-B and made out of cardboard, it's cute though
Specimen 2: Low-High Regen, Elemental Intangibility, and Speed Reduction, E-Rank AGI and C-Rank STR
Specimen 3: Poisons and Surface Scaling, D-Rank STR and B-Rank AGI
Specimen 4: Is a ghost, C-Rank AGI and D-Rank STR
Specimen 5: Creates smoke and shreds life in half, E-rank AGI and D-Rank STR
Specimen 6: Ignores space between the target and itself when attacking, C-Rank AGI and C-Rank STR
Specimen 7: Mind Manipulation, Perception Manipulation, and has all of the opponent's magecraft and personal skills, D-Rank AGI and D-Rank STR
Specimen 8: Darkness Manipulation (which causes the opponent to miss and get hit more), C-Rank AGI and B-Rank STR
Specimen 9: Gets stronger every second, can make it's corridor loop infinitely, C-Rank AGI and C-Rank STR
Specimen 10: Causes visual hallucinations, gets stronger and faster every time it misses, C-Rank AGI and C-Rank STR
Specimen 11: Power Nulls you into only being able to do one move, B-Rank AGI and B-Rank STR
Specimen 12: If killed without using magic, your mind gets significantly altered for the rest of the fight, B-Rank AGI and B-Rank STR
Specimen 13: Incredibly fast and agile in the water, weak outside of it but can quickly make it's way back in, A-Rank AGI and A-Rank STR
Specimen 14: Low-Mid Regen, Type 2 Immortality and significant skill with an axe, A-Rank AGI and A-Rank STR