Minisylvester is an alien encountered in the final boss level of Adventure Mode and available as a fish in the Virtual Tank. They are the juvenile counterpart of Sylvester.

Adventure Mode

During the Final Boss Fight, Cyrax will spurt out Minisylvesters. They aren't extremely threatening compared to other aliens. With the default level 8 laser, he can be quickly subdued in a couple of shots. Unlike his bigger form, however, he doesn't get full; he rapidly keeps eating the player's pets.


MINISYLVESTER was created by CYRAX to be sort-of "Yes-Man"
or "Toady". Originally he sought to make a MINICYRAX, but this
plan was disastrous as the MINICYRAXes conspired to do away
with their creator. CYRAX found the MINISYLVESTERs to be much
more malleable to his will... or at least that's what they have led him to believe...

Virtual Tank

These Minisylvester have been domesticated and are readily available to buyers who are fortunate and wealthy enough to encounter and purchase one. A rare and expensive "fish" but, unlike aliens of the other tanks, it will not eat or attack its tank mates. After about a week, it will mature into the big fully grown Sylvester, just like the aggressive ones Tanks 1 and 2 only passive. A Minisylvester costs 15,000 shells for a normal one and drops spiral shells worth 10 shells a piece. They sell for 7,500 shells after 24 hours and 22,500 shells after growing. A fully grown Sylvester drops the coveted Bag-O-Shells worth 20 shells. They almost pay for themselves after maturing.

Minisylvesters eat carnivores. As adults, they will find ultravores much more palatable.


Minisylvester and its food.

  • Minisylvesters never eat food smaller than themselves. As babies, they eat carnivores, and as adults, they eat ultravores. Both of these fish are about 1.5 times their size.
  • In Insaniquarium: Revenge of the Fish, Minisylvesters take the place of a guppy.
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