Marine Biology 4-U
Marine Invertebrates
Marine Invertebrates I Worksheet
Directions: View the PowerPoint titled “Marine Invertebrates,” and answer the questions below.
A. Name 15 different Phylum of marine invertebrates.
1) _______________________
2) _______________________
3) _______________________
4) _______________________
5) _______________________
6) _______________________
7) _______________________
8) _______________________
9)
10)
11)
12)
13)
14)
15)
_______________________
_______________________
_______________________
_______________________
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B. Complete the chart below with missing information about the following Phyla.
Phyla
3 Characteristics
Examples
Notes
Porifera
Cnidarians
Ctenophora
Platyhelminthes
Nemertea
Nematoda
Annelida
Bryozoa
Phoronida
Brachiopoda
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©2012 Science Education4-U
Marine Biology 4-U
Marine Invertebrates
C. Fill in the blanks.
1) Sponges collect food particles from water and are called __________________ feeders.
Watch the video to see how sponges filter water: http://youtu.be/T7E1rq7zHLc
2) Sponges have three body types and they are: ____________________________,
_______________________________, and _______________________________ .
3) Fill in the missing body parts in this diagram on a sponge.
4) While swimming in a tropical ocean, a diver finds a large, cup-shaped sponge big enough for
him to swim inside. The type of support that this sponge probably has is ______________
_________________________________________________________________________ .
5) The term that describes an organism that function as both male and female in sexual
reproduction by producing eggs and sperm is: ______________________________
6) The three classes of the Phylum Cnidaria include: ___________________,
___________________, and _________________________.
7) Cnidarians display __________________________ symmetry, having no true head, front, or
back.
8) There are two basic body forms of a Cnidarian: ____________________ and
_______________________ .
9) The stinging cells used for defense and to capture prey of Cnidarians are called
___________________.
10) Nearly all of the cnidarians are _____________________, preying on other animals.
11) The Portuguese Man-of-War is in which class of the phylum Cnidarian?
_________________________
12) In the Phylum Ctenophora, the comb-jellies are ____________________ symmetrical.
13) The flatworms belong to the Phylum ___________________________ .
14) The three groups of flatworms are: _____________________________,
_______________________, and _________________________________ .
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©2012 Science Education4-U
Marine Biology 4-U
Marine Invertebrates
15) Turbellarians are mainly free-swimming _________________________, because they feed
on other organisms.
16) Label the parts of the turbellarian.
17) Flukes are trematodes that engage in the symbiotic relationship called
________________________, because they feed on the tissues of other organisms.
18) Cestoda is the name given to a class of parasitic flatworms, commonly called
____________________________ .
19) Tapeworms do not have their own _______________________ system, but they absorb
nutrients from the skin of their _______________________ .
20) Poboscis are commonly known as ____________________ worms due to their curly shape.
21) Round worms are of the Phylum ______________________________ .
22) Annelida are ________________________ worms that have bodies divided into many
sections.
23) Annelids are _________________________ that cross-fertilize.
24) The three classes of Annelida are: __________________________ (leeches);
______________________ (earth worms); and _________________________ (mostly
marine worms).
25) A ________________________ is a horseshoe-shaped ciliated organ located near the mouth
of lophophorate.
26) Label the parts of the Ectoprocta:
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©2012 Science Education4-U