inexplicable
incapable of being explained.
aquatic
Having to do with marine life
prodigious
Of immense proportions
Leviathan
A huge, terrifying, dreadful underwater creature
carapace
The covering or exterior skin of something
contraption
A complicated machine designed for a specific purpose
cannibal
An entity which eats the flesh of its own species
tethered
Connected or secured to something else by a rope
renounce
To relinquish or abandon
infinity
Without end; timeless
eccentric
Idiosyncratic; slightly mad
impede
To hinder or obstruct
excursion
An adventurous journey or voyage
lavish
Posh; extravagant; ostentatious
luminous
Shining brightly
skiff
A small boat
isthmus
A narrow strip of land
capsize
Overturn so as to land upside-down
conjecture
To estimate based on limited knowledge
unimpeachable
Beyond reproach or indictment