into overfeeding the lionfish. Their systems
are not adapted for such frequent feeding,
as meals are few and far between in their
natural habitat. In addition, the degradation
of the water from such frequent feedings may
contribute to bloat.
It is difficult to do, but it is best to keep
lionfish a little on the lean side. If they learn
to take pellets instead of fish, even better. They
won’t cause bloat as long as you don’t feed
them too often.
I wanted to observe cleaning
symbiosis in the aquarium,
so I included some cleaner shrimp.
They soon disappeared. I had included
a tang, a butterflyfish, and a hawkfish in
my aquarium. Is the hawkfish the prime
Watertown, New York
That’s good detective work. I
presume that you didn’t see
the criminal in action, but
hawkfish are highly predatory.
They don’t “swoop down” on fish and other
animals too large to engulf, but cleaner shrimp
are definitely on their menu. The funny thing
is that I have seen hawkfish utilize the services
of a cleaner shrimp in the ocean. The contract
between cleaner and client apparently breaks
down in the confines of the aquarium. That
can happen with other fish, too, but it is most
definitely the case with hawkfish.
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The longnose hawkfish Oxycirrhites typus;
hawkfish are likely to prey upon inverts such
as cleaner shrimp in the aquarium.
My favorite fish are triggerfish,
and I was wondering if they
have been bred in captivity.
They are one of my favorites,
too, but they have not as yet
been bred in captivity. Actually,
I should restate that; they have
spawned in captivity a few times, but the
larvae have not been raised. One of the
reasons for that is that all triggerfish species
have a very protracted planktonic larval
stage. That is, the larvae spend a long time
in the planktonic rafts of the ocean, and they
may feed off of different prey at different
stages of their development. Of course, it was
once thought that none of the marine fish with
planktonic larval forms, which is nearly all of
the coral reef fish, would ever be spawned and
raised because of the planktonic larval form.
And yet, barriers have been defeated, and
many species have been spawned and raised.