"F" is for "Flensefin"

Flensefin

No. Enc.:  1d4 (1d10)
Alignment:  Neutral
Movement:  6' (2')
         —Fly:  150' (50')     
     —Swim:  90' (30')
Armor Class:  4 (or 9)
Hit Dice:  3
Attacks:  1 (slice)
Damage:  2d6
Save:  L2
Morale:  8
Hoard Class:  VII
XP:  125

Flensefins are 5' long amphibians with flattened bodies protected by razored "scales" and spines.  They lurk at the edges of bodies of fresh and/or polluted water, and in shallow pools.  Flensefins wriggle into the mire, but spy on their surroundings with telescoping eyestalks that extend to lengths of 5'.

When flensefins detect prey, they explode from the water (Surprising on a 1-4 on 1d6) and soar around their target, lacerating with abandon.  Anyone thus sliced suffers an additional 2 Hit Points damage per round from blood loss until the wounds can be properly bandaged.

Ungainly when grounded, a flensefin's AC rises to 9 when it is feeding or scuttling on land.

Their hides are prized by weaponsmiths and armorers.

Mutations:  Aberrant Form (Telescoping Eye), Night Vision, Psionic Flight