FOURTH AMENDMENT TO REVOLVING LOAN AND SECURITY AGREEMENT
            ---------------------------------------------------------


     THIS FOURTH AMENDMENT TO REVOLVING LOAN AND SECURITY  AGREEMENT dated as of
July  31,  2002,  but  effective  as of  June  30,  2002,  by and  among  BALTEK
CORPORATION, a Delaware corporation having its principal executive offices at 10
Fairway   Court,   Northvale,   New  Jersey  07647   ("Baltek")   and  CRUSTACEA
CORPORATION,a Delaware corporation having its principal executive offices at 106
Stonehurst Court,  Northvale,  New Jersey 07647 ("Crustacea") (each a "Borrower"
and collectively  the "Borrowers") and FLEET NATIONAL BANK,  successor by merger
to SUMMIT  BANK,  a banking  institution  of the State of New  Jersey  having an
office located at 208 Harristown Road, Second Floor, Glen Rock, New Jersey 07452
(the "Bank").

                               W I T N E S S E T H
                               -------------------

     WHEREAS,  the  Borrowers  and the Bank  entered  into a Revolving  Loan and
Security  Agreement  dated as of December 21, 1999,  (the "Loan  Agreement")  as
amended by a certain First  Amendment to Revolving  Loan and Security  Agreement
dated as of September 30, 2000, (the "First Amendment"), as further amended by a
certain Second  Amendment to Revolving Loan and Security  Agreement  dated as of
December 31, 2000 (the "Second  Amendment")  and as further amended by a certain
Third  Amendment to Revolving Loan and Security  Agreement dated as of September
28, 2001 (the "Third Amendment"),  (the Loan Agreement, First Amendment,  Second
Amendment,  and  Third  Amendment  are  collectively  referred  to as  the  Loan
Agreement).

     WHEREAS,  the  Borrowers  have informed the Bank of their plan to write-off
their investment in the Ecuadorian shrimp business and concentrate their efforts
on their expanding balsa business; and

     WHEREAS,  said write-off will require a revision to the Borrowers'  Minimun
Tangible Net Worth covenant as set forth in the Loan Agreement.

     NOW THEREFORE,  in  consideration  of the premises and the mutual covenants
contained herein, and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto do hereby agree
as follows:

          1. All of the terms and conditions of the Loan Agreement, as modified,
     are hereby specifically incorporated into, and made part hereof. In the
     event of an inconsistency between the terms of the Loan Agreement and this
     agreement, the terms of this Agreement will control.

          2. The definition of EBITDA in Section 1.1 of the Loan Agreement is
     hereby approved to read as follows:

          "EBITDA"  shall  mean  consolidated  operating  income  minus  special
          one-time charges, plus consolidated depreciation and amortization.





          3. Section 5.24 of the Loan Agreement, which section is contained as
     Paragraph 8 of the Second Amendment, is hereby modified to read as follows:

               "Commencing with the June 30, 2002 reporting period and
               continuing during the Term of the Loan Agreement, the Borrowers
               and their subsidiaries shall maintain a combined Minimum Tangible
               Net Worth of Twenty-Eight Million ($28,000,000.00) Dollars with
               annual step ups of One Million Two Hundred Fifty Thousand
               ($1,250,000,00) Dollars."

          4. Except as expressly modified herein, all of the terms and
     provisions of the Loan Agreement shall remain in full force and effect.



          IN WITNESS WHEREOF, the parties hereto have caused this Agreement to
     be duly executed and delivered by their proper and duly authorized officers
     as of the day and year first above written.



ATTEST:                                     FLEET NATIONAL BANK, successor
                                             by merger to Summit Bank


By: /s/ Terri Fermo                        By: /s/ Richard H. Mady
    ---------------------------                 -------------------------------
                                                Name:  Richard H. Mady
                                                Title: Senior Vice President




ATTEST:                                     BALTEK CORPORATION



By: /s/ Ronald Tassello                     By: /s/ Jacques Kohn
    ---------------------------                 -------------------------------
                                                Name: Jacques Kohn
                                                Title:President


ATTEST:                                     CRUSTACEA CORPORATION



By: /s/ Ronald Tassello                     By: /s/ Jacques Kohn
    ---------------------------                 -------------------------------
                                                Name:Jacques Kohn
                                                Title: President