Composition and/or combination for aquaculture

A particulate composition formulated for administration to a fish, crustacean, or mollusk, comprising a particulate feedstuff for a fish, crustacean, or mollusk, an adhesive agent, and a first composition comprising:

• glucan, silica, mineral clay, mannans and endoglucanohydrolase;
• or
• glucan, silica, mineral clay, mannans, endoglucanohydrolase, yucca and quillaja;
• wherein
• each particle of the particulate composition comprises a core comprising a feedstuff particle wherein the feedstuff is a feedstuff for fish, crustaceans, or mollusks, the adhesive agent forms a first layer that at least partially covers the feedstuff particle, and the first composition forms a second layer that at least partially covers the first layer;
• each particle of the particulate composition is formulated for administration to the fish, crustacean, or mollusk, such that each dimension of the particle is no more than 3 mm, and therefore the particle has a particle size of from greater than 0 mm to 3 mm;
• and
• the first composition is present in the particulate composition at an amount of from 500 mg to 7,500 mg per kg of feedstuff.